Hi Fmejuunin, this is not the first sugestion like this and the developers said this:

@peteryeungwt Will there a option for user to stop receiving friendly invite?

We’re working on improving friendly invites.

here Ask the Devs LIVE - Answers! - Top Eleven be a Football Manager you can find more.

And please next time you create another thread use the search button to see if the subject was already discussed.