Is it possible to intercept curl?

Question

PHP

A feedback form is sent from one site, the data is sent immediately to the mail, it became necessary to write data to the database, which is located on a completely different domain and server.
Yuzayu CURL, but the question. Will the sender be able to track this curl in any way? where it is sent, what data, etc.? how to secure this action?

Answer 1

can not. unless, of course, he has access to the server or his channel.