If your organization requires a PO, include: billing address, ship-to address, and number of prep rooms.
What to include in your email
Organization name and primary contact
Number of prep rooms to be tested
Preferred testing window (month / quarter)
Any chain / insurer / school coordination requirements
Implementation note: Avoid shopping-cart scripts or third-party embeds until you explicitly choose a payment provider
(they can trigger 403s via CSP/WAF rules on shared hosts).