Just affidavits from relatives/friends stating they know you and your spouse and that they believe you two married in good faith
Such affidavits are not mandatory.
It is not mandatory, yes. However, you should know how vague USCIS can be when it comes to requiring "specific" documents. Despite that, two affidavits are actually recommended by USCIS, and it is in print in clear language in the I751 instructions.
you mean the affidavit of support that are not mandatory?
I just want to know if it is afficavit of support or just letter stating that we were together?