Placing an order

Checkout is a three-step wizard: shipping → billing → review.

Shipping

Pick a saved shipping address or add a new one. We validate the state against our per-SKU allowlist — if any line item is restricted in the destination, you'll see an inline block here (not after the package ships).

Billing

Pick a billing address. For invoice-based checkout (the default) we don't ask for card details — payment instructions accompany the invoice email.

Review

A line-by-line summary with lot numbers, prices, taxes (where applicable), the chosen rep code (if any), and the grand total. Click Place order to submit.

What happens on submit

1. We lock the earliest-expiring lot for each line and create the order record atomically. If two clinics race for the last vial, only one wins — the other sees a clear INSUFFICIENT_INVENTORY message.
2. We render an invoice PDF and email it to you with payment instructions.
3. Your order appears on /orders with status pending_payment.

You get an order number formatted PO-YYYY-NNNN for tracking and bookkeeping.