You cannot get a blue tick on WhatsApp by request or purchase
The blue tick appears automatically when the recipient reads your message
Ensure the recipient has read receipts enabled
In group chats, blue ticks appear when all participants have read the message
If read receipts are turned off, blue ticks may not appear
Keep WhatsApp updated to the latest version
Use a verified business account if you mean the WhatsApp Business verification badge
Apply for WhatsApp Business verification through Meta Business Manager
Meet Meta’s eligibility requirements for business verification
Use an official business profile with accurate details
Avoid third-party services that claim to sell blue ticks