Contact details are blocked

Until there is a confirmed booking, the chat does not carry contact details. Phone numbers, email addresses and links are refused.

The check runs on the server, not on your device. A message that is caught is not sent at all, and the other side does not see it.

There is no warning first. Either the message goes through or it is refused, and there is no step in between.

Workarounds do not help. A number written out in words, in another set of digits, or with invisible characters between the digits is still read as a number.