If you've been asked to integrate the WhatsApp Business Platform (Cloud API) into a client project, you've probably discovered that the hardest part isn't the API calls — it's everything Meta requires around business verification, number quality, and message templates. A lot of integrations get stuck or blocked after launch because of a handful of avoidable mistakes. Here's what tends to trip people up.
1. Business verification gets rejected due to mismatched details
Meta cross-checks your Business Manager legal name, address, and website against public records (tax registries, WHOIS, etc.). Even small mismatches — an abbreviated legal entity name, a website with no working contact page — can trigger rejection. Fix the paper trail before you touch code.
2. Using a number with an existing WhatsApp history
Numbers that were previously active on the WhatsApp Business App need to go through a migration/coexistence flow, not a fresh registration. Treating it as a new number usually causes verification errors or lost conversation history.
