Automate Shopify Dropship Orders without touching the S&S Supplier Portal

You log into your supplier's portal twice a day. You copy the new Shopify orders into the supplier's PO form by hand, or you upload a spreadsheet that the supplier's system half-reads, or you click through a queue of one-by-one order entries because the bulk uploader doesn't accept your shipping addresses. Then you copy the supplier's tracking numbers back into Shopify so the customer gets a notification.

It's not the hardest job in the shop. It's just the one that has to happen every business day forever, the one that breaks when somebody is on vacation, the one that pushes orders ten or twelve hours later than your customers expect them to ship.

This article shows how to take that whole loop off your team's hands. Every paid Shopify order on an eligible supplier is forwarded automatically — blind-labeled, with your return address, on the carrier you chose — and tracking comes back into Shopify on its own. No portal logins. No spreadsheet POs. No copy-paste at the end of every business day.

The same playbook works for any supplier Supply Master supports for native order forwarding. Today that's S&S Activewear and PromoStandards suppliers - the walk-through below uses ACC as the named PromoStandards example end-to-end and S&S as the second worked example, so you can map the pattern to whichever supplier matches your shop.

Running examples used throughout this article: Atrium Dropship Co., a Shopify apparel reseller running ACC for blank-only dropship of Bella+Canvas, Comfort Colors, and Champion blanks (about 1,200 SKUs after filtering); Coastline Apparel Co., a national wholesale-apparel reseller running S&S Activewear in pure-dropship mode; and Atelier 27, a corporate-merch shop running ACC on Manual + Submit Now because every order needs design-lead artwork approval before the PO goes out.

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• What this article shows — the end-to-end playbook to switch from manual portal-based order placement to automated dropship-order forwarding, including blind shipping, tracking sync, and the hold-until-art-approved variant for shops that need a checkpoint before the PO goes out.
• Who it's for — Shopify dropshippers and corporate-merch shops on S&S, ACC, or other PromoStandards suppliers, currently running orders by hand or spreadsheet.
• The bottom-line outcome — the manual order-placement loop drops to zero on supported suppliers; tracking sync arrives in Shopify automatically; orders ship the same business day at the supplier's standard cadence.
• Try it now — Install Supply Master free on the Shopify App Store (5.0★, top-rated for apparel-supplier integration in the U.S. and Canada).
• Want help? — Email support@comstack.com and a Comstack engineer will set up order forwarding with you in a 30-minute onboarding call, including credential validation and a live test order.

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Table of contents

• What "hand off your dropship orders" actually means
• Which suppliers support automatic order forwarding today
• The four order-mode choices
• PromoStandards setup walk-through (ACC as the example)
• S&S Activewear setup walk-through
• Blind shipping — what the customer actually sees
• Tracking flow back into Shopify
• The hold-until-art-approved variant
• Edge cases and honest gotchas
• What to do this week
• FAQ
• Try it on your store

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What "hand off your dropship orders" actually means

Before the setup, the moving parts:

• Order capture — Supply Master sees every paid Shopify order within 30 minutes (or immediately on a scheduled run, depending on your configuration).
• Supplier match — Supply Master identifies which line items came from which supplier (S&S, ACC, others) based on the supplier connection that originally imported the product.
• Eligibility check — only line items from suppliers with Order Sync set to Automatically Fulfill Orders are forwarded. Lines from other suppliers stay where they are.
• PO placement — eligible lines are placed at the supplier through the supplier's order-placement API (PromoStandards for ACC; S&S Activewear's native order endpoint for S&S). The PO carries a customizable Dropship PO Number, your shipping address (which is the customer's address), the carrier and service you specified, and the dropship flag.
• Tracking sync — when the supplier ships, the supplier's API returns the tracking number; Supply Master writes it back to the Shopify order, which fires the standard "your order has shipped" email to your customer.

What you stop doing once this is on: logging into the portal, retyping orders, downloading the supplier's CSV at end of day, copy-pasting tracking numbers back to Shopify, fielding the "where's my order" emails that come from the lag between Shopify and the supplier portal.

What you keep doing: monitoring App Orders for the rare failure (credential expiry, item discontinued at the supplier, address validation failure), confirming on busy weeks that the carrier choice is still right for your customer base, and running the occasional credit refresh with your supplier's accounting team.

The trade is large. The setup is small.

Which suppliers support automatic order forwarding today

Native automatic forwarding through Supply Master is currently available on:

• S&S Activewear — through S&S's native order-placement API. Supports auto-warehouse selection or fulfillment-location-driven warehouse selection, your shipping carrier and service, and your billing-profile email or Credit on the S&S account.
• PromoStandards suppliers — including ACC (Alphabroder Charles), and other suppliers that expose PromoStandards order endpoints. Supports your Dropship PO Number, shipping carrier and service per supplier, and PromoStandards API credentials.

In development:

• SanMar US — Supply Master is working with SanMar on the order-placement API integration. Until it ships, SanMar runs on Manual or Disabled and orders are placed through SanMar's dealer portal.
• AlphaBroder (non-PromoStandards path) — also in development.

Other suppliers (Cap America, AS Colour US, Augusta Sportswear, JDS Industries, Champro, Goldstar, Decky, OTTO Cap, Edwards Garment, Scrub Authority, Atlantic Coast Cotton standalone, etc.) run as catalog-and-stock-only today; orders are placed through each supplier's own reseller channel.

The canonical, always-current list is the supported suppliers and features matrix. Check it before you commit to a workflow.

The four order-mode choices

Order routing is configured per supplier on Edit Supplier > Order Settings > Order Sync. Four modes:

• Mode: Mode | When orders go to the supplier: When orders go to the supplier | Best for: Best for
• Mode: Automatically Fulfill Orders | When orders go to the supplier: Every 30 minutes after the customer pays. | Best for: Pure dropshippers; volume-sensitive shops; "ships next business day" promises.
• Mode: Fulfill Orders at Scheduled Time | When orders go to the supplier: Once per day, on the next processing run after your chosen time (local timezone). | Best for: Shops batching orders for an end-of-day operations review.
• Mode: Manually Fulfill Orders | When orders go to the supplier: Only when you click Submit Now on the order in App Orders. | Best for: Corporate-merch shops with art approval, decorators with a QA gate, or anyone who wants a human checkpoint per order.
• Mode: Disabled | When orders go to the supplier: Never (you place orders outside the app). | Best for: Decorators who never dropship, or any supplier that hasn't yet shipped automatic forwarding.

You can mix modes per supplier in the same store. Atrium runs ACC on Automatically Fulfill Orders; the same store could run a different supplier on Manually Fulfill Orders if it has a different workflow. See Run Decorator Jobs and Dropship Orders from One Store for the per-supplier mode pattern.

For the merchant-facing walk-through of all four modes in plainer language, see Control How Orders Get Sent to Your Supplier.

PromoStandards setup walk-through (ACC as the example)

The ACC setup is the cleanest example of the PromoStandards order-forwarding flow. Atrium Dropship Co. ran their first three years on manual portal placement; they switched to ACC's PromoStandards endpoint through Supply Master and never logged back into the portal for order placement.

Step 1 — Confirm PromoStandards order access on your ACC account

PromoStandards order placement is a separate API tier from PromoStandards inventory and product. Most ACC accounts have inventory and product enabled by default; the order endpoint usually requires a one-line confirmation from your ACC rep. Email them: "Please confirm PromoStandards order endpoint access is enabled on my account [account number]."

If your rep doesn't have visibility into the API tier, ask them to loop in ACC's PromoStandards or EDI team. The confirmation usually takes one business day.

Step 2 — Add ACC in Supply Master if you haven't already

Suppliers > Add supplier > Atlantic Coast Cotton (ACC). Plug in your PromoStandards username and password (these are distinct from any FTP or catalog login you use for ACC — confirm with your rep if you're unsure). Validate.

Step 3 — Set Order Sync to Automatically Fulfill Orders

On the ACC supplier card: Edit Supplier > Order Settings.

• Order Sync: Automatically Fulfill Orders. Eligible orders will be placed every 30 minutes after the customer pays.
• Dropship PO Number: customize using Liquid if you want a recognizable suffix. Atrium uses {{ shopifyOrderNumber }}-DS so they can spot Supply-Master-placed POs in ACC reports.
• PromoStandards Username: from your ACC PromoStandards credentials.
• PromoStandards Password: from your ACC PromoStandards credentials.
• Shipping Carrier: UPS (or your preferred carrier). For ACC, the carrier and service must match what ACC supports for your region.
• Shipping Service: UPS GROUND (or expedited if your customer base demands speed).

Click Save Supplier.

Step 4 — Show the Orders tab if you want visibility

Edit Supplier > Advanced Settings > Orders Tab: Show Orders Tab. Now Orders appears on the ACC supplier card with two sub-tabs:

• App Orders — every Shopify order Supply Master has captured for this supplier, with status (Queued, Pending, On Hold, Submitted, Failed).
• Supplier Orders — every order returned from the ACC API for the supplier-side audit trail.

Atrium's ops lead checks App Orders > Failed once a day, which is the only manual-touch step in the new workflow. Most days the list is empty.

Step 5 — Place a test order

Set up a $1 test product on your Shopify store. Place a test order to a test address. Within 30 minutes:

• The order moves from Queued to Submitted in App Orders.
• The PO appears in ACC's order system tagged with your Dropship PO Number.
• ACC ships per the carrier and service you specified, blind-labeled with your shipping address as the return address.
• Tracking returns to Shopify within 24-48 hours.

If anything in the flow fails, the failure shows in App Orders > Failed > Details. The most common first-test failures are credential mismatches (wrong PromoStandards username/password) and shipping-service mismatches (an unsupported service for your region). Both are quick fixes.

What Atrium gained from the switch

Before the switch: Atrium's ops lead spent about 90 minutes per business day in the ACC portal placing the day's orders. Across a five-day week, that was about 7.5 hours of clerical work. After the switch: Atrium's ops lead spends about 10 minutes per day glancing at App Orders > Failed and addressing rare exceptions. The recovered time was reallocated to merchandising and customer service.

For more on the ACC-specific catalog and inventory side, see the Atlantic Coast Cotton supplier pillar.

S&S Activewear setup walk-through

The S&S Activewear setup uses S&S's native order-placement API, which exposes a few options PromoStandards doesn't (warehouse-selection control, S&S-specific shipping methods, S&S billing-profile payment).

Step 1 — Confirm S&S web-services access on your account

S&S web-services API access is granted on request by your S&S rep. If your S&S account doesn't yet have it, ask: "Please enable the web-services API on my S&S account [customer number] for the order placement and inventory endpoints." Most S&S accounts get web-services access enabled within a business day.

Step 2 — Add S&S Activewear in Supply Master if you haven't already

Suppliers > Add supplier > S&S Activewear. Plug in your S&S API username, password, and customer number. Validate.

Step 3 — Set Order Sync to Automatically Fulfill Orders

On the S&S supplier card: Edit Supplier > Order Settings.

• Order Sync: Automatically Fulfill Orders.
• Warehouse Selection: Auto Select Warehouses is the default — S&S picks the closest warehouse with stock for each order. If you want Shopify's fulfillment location to drive warehouse choice, pick From Fulfillment Locations and configure the mapping in Edit Supplier > Inventory Settings. If you want each order line to specify a warehouse via a warehouse line-item property (advanced), pick From Line Item Properties.
• Shipping Method: Cheapest (S&S routes ground via the most cost-effective option). Pick a specific carrier or service if your account or workflow requires it (UPS Ground, FedEx Express, pickup, etc.).
• Order Payment Settings (Profile Email Address): the email on your S&S billing profile with a saved card. Or type Credit if S&S has approved credit terms on your account.

Click Save Supplier.

Step 4 — Map your Shopify locations to S&S warehouses (if you chose From Fulfillment Locations)

Edit Supplier > Inventory Settings. For each Shopify location you ship from, pick the S&S warehouse that should source orders fulfilled from that location. Coastline Apparel Co. ships from a Phoenix-area location; they map their Shopify "Phoenix Warehouse" to S&S's Reno NV warehouse so orders out of the Phoenix location pull from the closest-with-stock S&S facility.

If you chose Auto Select Warehouses in Step 3, you can skip this mapping — S&S handles the routing for you.

For more on multi-warehouse inventory across S&S's eight U.S. facilities, see Multi-Warehouse Inventory on Shopify: Combine, Filter, or Map?.

Step 5 — Show the Orders tab and place a test order

Same as the ACC walk-through. Confirm the Orders tab is visible; place a $1 test order; confirm it lands as Submitted in App Orders within 30 minutes; confirm S&S ships from the expected warehouse.

What Coastline Apparel Co. gained from the switch

Before the switch: Coastline ran a daily 4pm spreadsheet handoff to S&S — pulled the day's Shopify orders to CSV, formatted to S&S's import template, uploaded through S&S's bulk-order tool, then matched tracking back to Shopify the next morning. Roughly two hours per business day, plus any catch-up after a busy weekend. After the switch: zero handoff time. Coastline's owner monitors App Orders > Failed from a phone for two minutes a day and emails support if anything looks unusual.

For more on the S&S catalog, brand mix, and warehouse footprint, see the S&S Activewear supplier pillar.

Blind shipping — what the customer actually sees

The most common question new Supply Master users ask before turning on order forwarding: "Will the customer know the order shipped from my supplier?"

For both S&S and PromoStandards (ACC) order forwarding through Supply Master, the answer is no — assuming your supplier account is configured for blind shipping at the supplier side. Both S&S and ACC support blind shipping by default for accounts in good standing.

Specifically:

• Return address on the shipping label. Your shipping address (your Shopify store's name and address), not the supplier's.
• Packing slip. No supplier branding on the packing slip. The packing slip references your Dropship PO Number (which can be styled to look like your Shopify order number using a Liquid template such as {{ shopifyOrderNumber }}).
• Box. Standard shipping carton; no supplier logo, no supplier marketing inserts.
• Carrier label and tracking. The carrier (UPS, FedEx, USPS) is whatever your supplier ships with; the tracking number returns to Shopify and triggers your standard Shopify shipping notification, which carries your store's branding.

The customer's experience is: they ordered from your store; they got an email from your store with a tracking number; the box arrived with a return label that says your store name. They have no reason to suspect a third party shipped it.

If you've never run blind shipping with your supplier before, mention "blind shipping confirmation" to your supplier rep when you confirm API access — most reps will explicitly confirm blind shipping is on for your account.

Tracking flow back into Shopify

Once the supplier ships, tracking flows back into Shopify automatically through the same supplier API that placed the order. The mechanics:

1. Supplier ships. S&S or ACC packs and labels the order; the carrier picks up; the supplier's system records the tracking number against the PO.
2. Supply Master polls the supplier's order-status endpoint. Every supplier has slightly different polling cadence per their API; for S&S and PromoStandards, tracking usually returns within 24-48 hours of shipment.
3. Supply Master writes the tracking number to the Shopify order. The Shopify order's fulfillment is updated; the carrier and service are populated; the standard Shopify "your order has shipped" email fires automatically.
4. Customer receives the shipped notification. Standard Shopify branding, your store name, the supplier's tracking link.

If the supplier has not returned tracking after 72 hours, the order shows as still Submitted (placed but not yet shipped) in App Orders. This is rare for ACC and S&S in normal operations and almost always means the supplier has a real backlog or the order was returned for an issue. Details on the order shows the supplier's most recent status.

The hold-until-art-approved variant

Atelier 27 runs ACC for corporate-merch orders that involve customization Atelier 27 does not perform — ACC ships the blanks, Atelier 27 applies a heat-transfer logo, then re-ships to the customer. Wait, that's a decorator workflow. The harder case: Atelier 27 also runs ACC for blank orders that go straight from ACC to the customer, but the customer's order includes art-approval steps before the order is allowed to go out (e.g., the art design is for a co-branded item where the customer has to sign off on the artwork before the order is locked in).

This is the textbook case for Manually Fulfill Orders plus the Hold Order / Release Hold workflow.

Setup

• Edit Supplier > Order Settings > Order Sync: Manually Fulfill Orders. No order is forwarded automatically. Every paid Shopify order lands in App Orders as Pending.
• Edit Supplier > Advanced Settings > Orders Tab: Show Orders Tab.

Daily workflow

When a customer pays, the order lands in App Orders as Pending. Atelier 27's design lead reviews the order:

1. If the artwork is already approved: the design lead clicks Submit Now. The order is forwarded to ACC within the next 30-minute processing run.
2. If the artwork needs the customer's sign-off: the design lead clicks Hold Order. The order's status changes to On Hold. Atelier 27 contacts the customer for artwork approval; once approved, the design lead clicks Release Hold and then Submit Now. The order is forwarded.
3. If the artwork is rejected by the customer: the design lead leaves the order on On Hold and contacts the customer for an alternative; the order is either eventually released or refunded through Shopify (Supply Master doesn't trigger Shopify refunds, but a refunded order will not be re-submitted from Supply Master).

Why this works for QA-heavy shops

The hold-until-approved variant gives the design lead a single source of truth (App Orders > Pending and App Orders > On Hold) without forcing every order to go through manual portal placement. The supplier connection is still automated; only the timing of placement is controlled by the design lead's QA pass.

For decorators with similar QA requirements, the same pattern works for any supported supplier — set Order Sync: Manually Fulfill Orders and use the Hold Order / Release Hold controls in App Orders.

Edge cases and honest gotchas

Six things to plan for when you turn on automated order forwarding.

1. Failed orders are not retried automatically. This is intentional: a failed order that's automatically retried can become a duplicate order at the supplier, which costs you (you still owe the supplier for both). When a failure happens, App Orders > Failed > Details shows the cause; you fix the cause, then either re-place the order through the supplier's normal channel or contact Comstack support to retry safely. Most failures are credential or address issues, not Supply Master issues.

2. Address validation can fail at the supplier API. Some addresses (PO boxes, military APO/FPO, certain international addresses) are rejected by S&S or ACC at the API level even though Shopify accepts them. Supply Master surfaces these as failures with the specific API error message. The fix is usually to ship the order through your supplier's portal manually or to contact the customer for an alternate address.

3. The supplier may have its own order-cutoff time per warehouse. S&S's same-day-ship cutoff varies by warehouse (typically mid-afternoon local time at each facility); ACC's cutoff is similar. An order placed at 4pm Eastern via Supply Master will be picked up by the supplier's next packing wave, not necessarily shipped same-day. Plan your "ships next business day" customer promise around your supplier's cutoff schedule, not around Supply Master's 30-minute placement cadence.

4. Carrier and service availability is supplier-side. If you pick UPS Express and your supplier's account doesn't have UPS Express enabled, the order will fail with a carrier-service error. Confirm your supplier account supports the carrier and service you select before you turn the supplier on at scale.

5. Multi-supplier orders are split into per-supplier POs. A single Shopify order with three line items from three suppliers becomes three POs at three suppliers (assuming all three are on Automatically Fulfill Orders). Each supplier ships its line independently; the customer gets three tracking numbers in three separate "your order has shipped" notifications. Most customers tolerate this fine; if your customer base expects a single shipment, you'll want to aggregate before fulfillment, which is a different workflow.

6. Refunds and cancellations don't auto-cancel at the supplier. A Shopify order refund does not cancel the supplier-side PO if the order has already been forwarded. If you refund within the supplier's order-cancellation window, you have to cancel the supplier-side PO through the supplier's normal channel as well. Most suppliers have a 1-2 hour cancellation window after order placement.

What to do this week

Five steps. The first one takes ten minutes.

1. Confirm API access with your supplier rep. Email them: for S&S, ask about web-services access; for ACC or any PromoStandards supplier, ask about PromoStandards order endpoint access. Time: 10 minutes. Supplier turnaround: 1 business day.
2. Install Supply Master free on the Shopify App Store if you haven't already. Time: 5 minutes.
3. Add the supplier in Supply Master and validate credentials. Time: 10 minutes.
4. Configure Order Sync to Automatically Fulfill Orders (or Manually Fulfill Orders if you need an artwork-approval gate). Set carrier, service, payment, warehouse selection, and Dropship PO Number. Time: 15 minutes.
5. Place a test order to a test address. Confirm the order forwards to the supplier within 30 minutes; confirm tracking returns to Shopify within 48 hours; confirm the package arrives blind-labeled. Time: 5 minutes of setup; the supplier's normal ship time before you can validate the box.

Total time to a fully running automated handoff: about an hour of your time, plus a business day for the supplier API confirmation and a day for the test box to arrive. A Comstack engineer will run the whole thing with you on a 30-minute onboarding call if you'd rather not figure it out yourself.

FAQ

What about my historical orders?

Historical orders are unaffected. Only orders placed after the Order Sync switch are forwarded automatically. Your historical Shopify orders stay in their existing state; you complete or close them through whatever channel you used originally.

Will my supplier rep have to do anything?

For S&S, the rep enables web-services API access on your account if it's not already enabled. For PromoStandards suppliers like ACC, the rep confirms PromoStandards order endpoint access. Both are quick (typically one business day). Once access is on, the rep doesn't see Supply Master directly — the supplier's API recognizes your standard credentials and processes the orders as it would any other API-placed order.

How long until my orders start forwarding automatically?

Within 30 minutes of saving the supplier configuration with Order Sync: Automatically Fulfill Orders. The first paid Shopify order on that supplier after save is the first automated forward.

What about my custom price rules?

Custom pricing is unaffected. Pricing rules live in Edit Supplier > Product Settings > Match Fields and run on every catalog sync; they don't interact with order placement. The price the customer paid is the price Shopify recorded; the supplier-side PO uses the supplier's wholesale cost (which is also what ACC or S&S charges you for the order).

Will I lose my supplier-side order history?

No. Your supplier still keeps every order in their own system; Supply Master adds a parallel record in App Orders and Supplier Orders. You can audit the supplier's records or Supply Master's records at any time.

What does it cost?

Free trial. Plans scale with total variant count and total update volume across all suppliers, in one plan. Order forwarding is included in every plan tier — there is no per-order or per-supplier order-forwarding charge. Exact plan pricing on the App Store listing.

Can the Comstack team set up order forwarding for me?

Yes. Email support@comstack.com and book a 30-minute onboarding call. A Comstack engineer will validate credentials, configure the supplier-side options, place a test order with you, and confirm tracking returns before you go live with real customer orders.

What if I want to switch back to manual order placement?

Change Order Sync from Automatically Fulfill Orders back to Manually Fulfill Orders or Disabled on the supplier. The change takes effect immediately. Future orders won't auto-forward; orders already submitted to the supplier are unaffected.

How does this compare to placing orders through the supplier's portal manually?

Functionally equivalent on the supplier's end — the supplier receives the same PO with the same line items, addresses, and shipping options. The difference is that you don't touch the portal: Supply Master places the order, returns the tracking, and writes the result back to Shopify.

Try it on your store

The end of the manual order-placement loop is one supplier configuration away. Set the order mode. Plug in the credentials. Place a test order. Once the test ships, the supplier's portal becomes a place you visit only for credit reviews and product-question support — not a place your team logs into every business day to keep the orders moving.

1. Install Supply Master free on the Shopify App Store — 5.0★, top-rated for apparel-supplier integration in the U.S. and Canada.
2. Or email support@comstack.com and book a 30-minute onboarding call. A Comstack engineer will set up your supplier order forwarding with you — credential validation, configuration, test order, tracking confirmation — in one session.

Comstack has been building integrations for apparel and promo suppliers since 2012. If your team is still placing orders by hand on a supported supplier, the right setup is one configuration session away.

Turn on automatic forwarding. Place the test order. Stop logging into the portal.

Key Takeaways

• Who it's for — Shopify dropshippers and corporate-merch shops on S&S, ACC, or other PromoStandards suppliers, currently running orders by hand or spreadsheet.
• What "hand off your dropship orders" actually means
• Which suppliers support automatic order forwarding today
• The four order-mode choices
• PromoStandards setup walk-through (ACC as the example)