This is a description of "'ECAF"' fraud happening and a warning to everyone what to look for and avoid:

EOS Tribe Fund account received the following transaction from ecafofficiel account claiming to be ECAF:

Once we followed a link - we get to the full message:

And following that link takes you to a web form asking for your owner and active private keys to confirm that you really do own account:

As you can see this is just another way to defraud trusting users from their private keys and at the end steel your funds.

As a rule: never give your private key to anyone!