When Multi‑Cart Checkout Is Allowed

You can check out multiple subject carts together as long as all of the following conditions are met:

Jobs that require a Custom Form at checkout must be checked out separately.
If any subject in your cart uses a Custom Form, multi‑cart checkout won’t be available.

Pre‑order jobs must be checked out individually as they require a custom form for matching subjects to orders.
If any subject is part of a pre‑order, you’ll need to complete that purchase on its own.

If a job has “Hold Order Fulfillment Until Manual Release” enabled, it cannot be combined with other carts in a single order.

All jobs included in a multi‑cart order must share the same cart template.
If templates differ, you’ll be prompted to check out separately.

If you see that subjects orders are being separated into individual carts, it means one or more of the rules above apply. You can still complete your purchase—just check out each subject order individually.