How to Handle Out-of-Stock and Back-Order Requests in Shopify POS

It happens in every retail store, multiple times a day: a customer asks for something you don't have in stock. Maybe you're out of their size. Maybe your supplier is backordered. Maybe it's a product you could get but don't typically carry. Whatever the reason, the moment you say "sorry, we don't have that," you risk losing the sale entirely.

The instinct to just say "no" is understandable — there's no native way in Shopify POS to formally take a special order or backorder request. But "no" is expensive. Research consistently shows that a meaningful portion of customers who hear "we don't have it" walk out the door and buy from a competitor — often online — within hours. That's not just one lost transaction. It's potentially a lost customer relationship.

The fix is simpler than most store owners expect. A proper Shopify POS out of stock special order workflow turns the moment of disappointment into a moment of commitment — from both sides. This guide walks through exactly how to build that workflow in your Shopify POS store using OrderMAX.

Why Shopify POS Doesn't Handle This Natively

Shopify POS is excellent at ringing up inventory you have on hand. You can technically "oversell" certain products by disabling inventory tracking, but that's not a special order system — it's just turning off guardrails. There's no native concept of:

• A formal special order linked to a specific customer
• A deposit payment tied to that order
• A vendor purchase order created to fulfill the request
• Automatic customer notification when the item arrives
• A status workflow to track the order from request to pickup

Without all of these pieces, you're not running a special order program — you're making promises on sticky notes and hoping your team remembers to follow through. That's where a Shopify POS out of stock special order solution like OrderMAX fills the gap.

Three Scenarios, One System

Not all out-of-stock situations are the same. Before building your workflow, it helps to understand the three scenarios your staff will encounter:

Scenario 1: The Backorder (Coming Back in Stock Soon)

Your supplier has the item; you just haven't received your next shipment yet. You know stock is coming in two weeks. This is the simplest case: take the customer's information, commit them with a deposit, and flag the item so that when your shipment arrives, it's immediately reserved for that customer rather than going to the general floor.

Scenario 2: The True Special Order (Sourced Specifically for This Customer)

This item isn't part of your regular inventory cycle. You need to place a one-off order with your supplier specifically because a customer wants it. This requires creating a vendor purchase order tied to the customer's request, so when the item arrives, there's no ambiguity about who it belongs to.

Scenario 3: The Cross-Supplier Sourcing Request

A customer wants something you don't carry, but you know a different supplier who has it. You're essentially acting as a broker — sourcing the item from a new or secondary vendor specifically for this order. The workflow is similar to a true special order, but may involve a vendor you haven't ordered from before.

OrderMAX handles all three scenarios with the same interface, because the underlying workflow — create order, link customer, create purchase order, receive item, notify customer — is the same regardless of which supplier is involved or how long the lead time is.

The Complete Shopify POS Out-of-Stock Special Order Workflow

Here's the step-by-step process your staff follows when a customer asks for something you don't have:

1. Open OrderMAX from the POS tile. Your staff taps the OrderMAX tile in Shopify POS — the same place they'd open any other POS app. No separate login, no switching devices.
2. Create a new special order. They select "New Special Order" and link it to the customer's Shopify profile. If the customer is new, they can create a profile on the spot.
3. Add the item details. Since this item isn't in your Shopify inventory, it gets added as a custom line item. Staff enter the product name, SKU if known, variant details (size, color, etc.), quantity, and price. All of this is captured in a structured way — not on a scrap of paper.
4. Collect a deposit. This is the critical step. Taking a deposit commits the customer to the purchase and gives you confidence in placing the supplier order. OrderMAX records the deposit amount against the order, so the outstanding balance is always visible.
5. Create a vendor purchase order. From within the same special order, staff can generate a purchase order to your supplier. This PO references the customer's order, so when the shipment arrives, receiving it in OrderMAX automatically links the incoming item to the waiting customer.
6. Set a realistic timeline and communicate it. Add the expected delivery date to the order. OrderMAX can send an automated confirmation to the customer summarizing what was ordered, the deposit paid, and the estimated timeline.
7. Receive the item and notify the customer. When your shipment arrives and you mark the item as received in OrderMAX, an automated notification goes out to the customer letting them know it's ready for pickup.
8. Collect the balance and close the order. The customer returns, pays the remaining balance, and the order is marked complete. The full payment history is logged and tied to the customer record.

How to Have the Conversation at POS

The system only works if your staff know how to use it — and that starts with how they respond when an item is out of stock. The wrong response ("sorry, we don't have it") is a dead end. The right response turns the moment into an opportunity.

Train your staff on language like this:

• "We don't have that in stock right now, but I can order it in for you. It typically takes about two weeks."
• "That color sold out, but I can place a special order and have it here by [date]. Would you like to put a deposit down to hold it?"
• "We don't normally carry that, but we can source it from our supplier. Let me get your information and we'll get that ordered."

The framing is important: you're not telling the customer you can't help them. You're offering them a solution. And by asking for a deposit in the same breath, you're treating it as the next step — not a big ask.

Setting Realistic Expectations and Keeping Customers Updated

One of the most common reasons special orders go wrong isn't the order itself — it's the communication gap in the middle. The customer places the order, days pass, and they have no idea what's happening. They start to wonder if you forgot. They call the store. They get frustrated.

Automated notifications solve this. OrderMAX can send an email when the special order is created (confirmation with deposit receipt and expected timeline), and another when the item is marked as received (ready for pickup notification). These two touchpoints cover the most important moments in the customer's experience without requiring your staff to manually follow up.

For longer lead times, it's worth setting expectations upfront. If an item typically takes 3–4 weeks, tell the customer 4–5 weeks. If it arrives early, they're pleasantly surprised. If there's a supplier delay and it takes 5 weeks, you're still within what you promised. Under-promise, over-deliver — it's especially important in special orders because the customer has already paid a deposit and is waiting on you.

What Changes When You Have a System

Stores that implement a formal Shopify POS out of stock special order process report a consistent set of improvements: fewer lost sales, higher customer satisfaction scores, and better staff confidence in handling requests they couldn't previously act on. There's also an operational benefit that's easy to overlook — visibility.

Without a system, "open special orders" are invisible. They live on paper, in email threads, in someone's memory. With OrderMAX, every open special order is visible in the dashboard. You can see at a glance how many orders are waiting on supplier delivery, which customers are due for pickup, and which orders have outstanding balances. That visibility lets you manage the workflow proactively rather than reactively.

For multi-staff stores, this is especially valuable. Any team member can look up a customer's special order status without needing to track down the person who originally took the order. The information is structured, searchable, and always current.

Getting Started

OrderMAX installs from the Shopify App Store in minutes and adds a tile directly to your Shopify POS interface. Setup involves adding your vendors, configuring your email notification preferences, and optionally setting your default deposit percentage. After that, your team is ready to take their first Shopify POS out of stock special order the same day.

There's no hardware required, no separate system to maintain, and no complex integration to configure. Everything lives inside Shopify — your orders, your customers, your payments, and your vendor purchase orders — all connected and accessible from both POS and Admin.