Restrictions and fines for sending messages to WhatsApp without the consent of subscribers
How to link mailings via API to a phone number that you have already used to communicate with clients?
There is no such option. To work with WhatsApp Business API, you need a business page registered to a new number.
What messages are allowed to be sent?
WhatsApp closely monitors this. The malaysia email list main requirement: for businesses, sending promotional messages and messages with advertising content is prohibited. The penalty for such a violation is blocking the account. It is allowed to send letters expected by the user. This includes:
Reminders about upcoming events (certain event, specialist appointment, etc.).
Notifications about changes in order status, stages of progress in the delivery process.
Answers to customer questions.
Messages about completed transactions (when paying for orders).
There are special registered templates with variables that must be used without fail when you need to do a mass mailing in WhatsApp. If an advertisement is added to the template, it may be rejected.
The rules for organizing shipments via VKontakte and Odnoklassniki (Mail.Ru Group holding) are the same.
Can an account be blocked?
In cases where mailings contain advertising, a business account (even with the status "verified") risks being blocked. WhatsApp monitors when there are too many blockings of your messages by users or when this indicator increases sharply in peak values.
What is allowed to be included in messages?
Text materials, documents, pictures, audio clips. You can insert smileys into messages and ready-made templates. It is allowed to make the text font bold, italic, and use strikethrough.
How does the system react if the client changes his phone number?
WhatsApp Business API can't know anything about this and react somehow. If you send a letter to the old number, you will simply receive a notification that it is invalid.