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Quick answer
A resilient WhatsApp Business API rollout should include:
- business verification and policy ownership
- template lifecycle controls and approvals
- webhook delivery and retry handling
- fallback paths to SMS and email channels
- release-gate tests for critical journeys
WhatsApp Business API implementation checklist
1) Account and compliance readiness
- verify business profile and sender eligibility
- assign policy and template approvers
- define escalation paths for rejected templates
2) Conversation and template model
- map transactional and support use cases to approved categories
- create template versioning and change-control workflow
- document required localization and legal review rules
3) Event ingestion and routing
- consume delivery and reply events via webhook
- apply idempotent processing for retries
- route failures to operational runbooks and alerts
4) Reliability and fallback design
- define fallback routing to SMS API
- keep high-priority notifications available through Email API
- test fallback behavior for outage and policy-failure scenarios
5) Release and QA gates
- validate end-to-end journeys in Email Sandbox
- enforce CI checks with Email Integration Testing
- confirm auth and campaign readiness through Campaign testing