WhatsApp guest messaging runs on Meta's WhatsApp Business Platform. Getting it live is a shared task: a few steps must be done by you, inside your own Meta account, and UpMarket can't do them on your behalf.
What you set up (in Meta)
A Facebook account and a business portfolio in Meta Business Suite.
A WhatsApp Business account.
Complete Meta's business verification.
Add a payment method / billing details in Meta. Meta bills you directly for WhatsApp conversations — this is the most commonly missed step.
What UpMarket does
Once the above is in place, UpMarket uploads your message templates, and verifies the account is ready for day-to-day use.
How to start
In the sidebar, open WhatsApp Numbers and follow the in-app guide to connect your number. Full walkthrough: Seamless WhatsApp integration in UpMarket.
Fixing a Meta "billing problem" banner
If you see a billing-problem warning blocking your templates, the payment method on your Meta account needs attention. In Meta:
Open your Business Portfolio → business.facebook.com/settings/payment-methods
Go to Billing & Payments → Payment Methods.
Click Add Payment Method, add your card, and save.
💡 This banner often appears only once real reservations start flowing, even if everything looked complete the day before — Meta only flags a pending payment method once messages actually need to be sent.
