Cost Savings: Avoids sending messages to non-existent or inactive WhatsApp numbers, saving on per-conversation costs (for API users).
Improved Delivery: Ensures your messages reach actual WhatsApp users.
Better Sender Reputation: Reduces bounce rates, which can negatively impact your sender reputation.
Crucial Note for PDPO 2025: Even when using the API to verify numbers, you must ensure that you already have explicit consent from the individuals on that list to process their phone numbers. The act of "verifying" them against WhatsApp's system is a form of data processing. You cannot just take any random list of numbers and check them against WhatsApp without prior consent.
Third-Party WhatsApp Number Validator Services (Use with Extreme Caution and Legal Review):
There are many online services and Chrome extensions that claim to "bulk check WhatsApp numbers."
Risks:
Security & Privacy: Many of these tools require you to upload your list or even log in to WhatsApp Web. This can compromise your data security and privacy. They may not comply with whatsapp number list PDPO 2025's strict data handling requirements.
WhatsApp ToS Violation: Most of these unofficial tools violate WhatsApp's Terms of Service and can lead to your account being banned.
Consent Issues (PDPO 2025): Even if a tool works, it doesn't give you the necessary consent from the individuals on the list to process their data, making its use for marketing illegal under PDPO 2025 in Bangladesh.
Recommendation: Unless it's a Meta-approved BSP that explicitly states its compliance and uses the official API for this purpose, it is generally safest to avoid these unofficial bulk checkers.
2. Verifying Your Own WhatsApp Business Account (Getting the Green/Blue Tick)
This is about verifying your business's identity with Meta (the parent company of WhatsApp) to build trust and unlock advanced features. This process is entirely separate from verifying numbers on your list.