Short answer
WhatsApp Business API approval has no single fixed duration because several separate checks happen. Phone number registration through Embedded Signup completes in the same session. Meta states that template review can take up to 24 hours. Business verification and display name review have no published duration, and delays usually come from mismatched business details.
What Meta actually reviews
| Step | What Meta checks | Published timing |
|---|---|---|
| Phone number registration | Ownership via SMS or voice code; number not active on WhatsApp | Completed during signup |
| Message templates | Format, category and policy compliance | Up to 24 hours (Meta) |
| Template appeal | Re-review of a rejected template, with a sample | Decision within 24 hours (Meta) |
| Business verification | Legal business details of the portfolio | Not published by Meta |
| Display name | Match with display name guidelines | Not published by Meta |
Can I send messages before business verification?
Yes. Meta's messaging limits start new business portfolios at 250 unique users per moving 24 hours for business-initiated messages. Verifying the business is one of the paths Meta lists to reach the 2,000 tier, so start verification early if you plan campaigns.
What causes delays
- Legal name, address or website on the business portfolio that do not match your registration documents.
- A phone number still active on the WhatsApp or WhatsApp Business app.
- A display name that does not clearly relate to the business.
- Templates with formatting errors, such as variables at the start or end, or the wrong category.
How to avoid them
Prepare your trade licence, website and brand name before signup, keep them consistent, and draft templates with sample values. OmniChannels.ai shows template approval status in the console, so you can track each submission.