I would just tell your guy that "hey my mom is like really annoying, we've heard of so many bad cases in the community, so now she's paranoid, so don't mind if she asks for your diploma or something." i'm not even lying, my mom is like this. she said she is going to verify the diploma with the registrar so she knows it's not fake. ...im like are you serious?!! and she says im her heera beti so she has to..lol
Good Idea !
Btw if it's a love marraige then your owrd of mouth should be a proff to her since u must be knowing him and all about him very well !
When my rishta was finalised my father did dig some info from his work place abt him . But we never ever asked for a proof of his degree or his income.