Why isn't my Carti flow sending emails in Klaviyo?

Check these in order:

1. The flow is not live. New flows start as drafts. Open the flow and click Review and turn on.
2. The shopper cannot receive marketing email. Flow emails only go to profiles subscribed to email marketing. Chat sign-ups are subscribed when they count as consent, see Why aren't chat sign-ups showing up in my Klaviyo list?
3. The shopper ordered or started checkout. The filters skip anyone who did, which is working as intended.
4. A newer recommendation replaced it. In Asked in chat, didn't buy, only the latest recommendation sends, 4 hours after it.
5. Smart Sending skipped it. Klaviyo skips anyone who got another email from you in the last 16 hours.
6. Klaviyo could not match the shopper. Carti sends events only for shoppers Klaviyo can recognize: chat sign-ups, logged-in customers, and visitors Klaviyo already knows. Anonymous chats do not trigger flows.

In Klaviyo, open the flow's email and check its Recipient activity tab to see who received it and who was skipped.