How to Add an Item to an Existing Order

2 min read · Updated July 2026

Your drop is closed, the invoices are out — and now a customer messages you wanting one more thing. Good news: nothing is locked. You can add an item to their order any time, and it drops right into the checkout link they already have.

TL;DR

You can add items to any order at any time — even after the drop closed and invoices went out.
There are two ways, and they end up in the same place: from your Orders page, or from the Sales Assistant dashboard.
Whichever you use, the new item lands in the customer's existing order and shows up in their checkout link with the amount owed.

Orders aren't locked once a drop ends

A closed drop doesn't close the door on selling. Orders stay open and editable, so if a customer wants to grab an extra piece after the fact, you just add it — no new link, no new checkout, no starting over.

One order, one linkOrders created through the Sales Assistant and orders you build by hand live together and sync together. So a manually added item and an item the Sales Assistant sold sit side by side in the same order — the customer sees one combined checkout, not two.

Pick whichever page you're already on

Both methods do the exact same thing. Use the one that's faster for where you already are — if you're in your Orders page, use Method 1; if you're in the Sales Assistant, use Method 2.

Method 1 — From your Orders page

Open the order
Go to your Orders page and click the customer's order to open it.
Click "Add item"
Inside the order, click Add item.
Look up the inventory item
Search your inventory for the item they want and select it.
Add it and enter the amount owed
Add the item to the order and type in the amount they owe for it. Done — it's now part of their order.

Method 2 — From the Sales Assistant dashboard

Open the drop
Go to your Sales Assistant and click the drop. It expands to show every item in that drop.
Click the item you want to add
Find the item the customer wants and click it.
Click "Create a manual sale"
Choose Create a manual sale for that item.
Add their username and the amount owed
Enter the customer's Instagram username and the amount they owe. The Sales Assistant matches it to their existing order and adds it in.

Same result, either wayMethod 2 uses the exact manual sale flow behind the scenes, so it lands in the customer's order just like Method 1. Grab whichever is closer to your cursor.

What the customer sees

The moment you add the item, it pops into the customer's checkout link — the same link they already have. Alongside the new item, they'll also see anything already in their order: items they still owe for (with the amount owed) and any items already marked paid. The paid items simply show as "already in my order," so there's no confusion and no double-charging — they only pay for what's still owed.

It just worksBecause manual and Sales Assistant orders sync together, the customer gets one clean, up-to-date checkout — no need to resend a link or start a new order. Want the full picture of what they'll see? Read How Checkout Works.

Common questions

Can I add an item after the customer already paid?

Yes. Add the new item and enter the amount owed — it shows up in the same checkout link as a fresh amount to pay. Their already-paid items stay marked paid; they only pay for the new one.

Will the customer get charged twice for what they already bought?

No. Items that are already paid show up in the order as "already in my order," not as something to pay again. The customer only checks out the new, unpaid amount.

Which method should I use — Orders page or Sales Assistant?

Whichever page you're already on. Both add the item to the same order and produce the same result for the customer. If you're managing orders, use the Orders page; if you're in a drop, use the Sales Assistant dashboard.

Do manually added items and Sales Assistant items stay in separate orders?

No — they live together in one order and sync together. That's why you can freely mix them without creating a second checkout for the customer.