My understanding is that, in program at least, making amends is more for the person making them and not particularly about how they are received. It's a conscience clearing effort to acknowledge past misdeeds and to make right as best they can...and then letting go.
Suggesting he will relapse if you don't accept his amends is simple manipulation and an attempt to make you feel guilty if you don't respond. It may all be just a way to have dialogue with you and break the no contact.
It is entirely up to you if or how you accept this. Personally, I would do nothing. Doing nothing is an action too and sends the message that you are not going to be drawn into his drama.
Good luck.
Hugs