Sorry didn't really know where to post thing but need some ideas/advice.
My gran is fairly elderly my grandpa passed last year so she now lives on her own. This is my DM mum. My DM has 3 other siblings. She used to be very close with one until my grandpa passed and they fell out. My aunty then became close with the other sister who she used to hate. This other aunty has always been quite selfish, asking for things off my gran e.g. her engagement ring and other things worth money.
When my grandpa passed these 2 aunties took it upon themselves to arrange all my gran' s financial affairs . To cut a long story short I've had a feeling these 2 aunties are taking advantage of my gran. They have control of her banks. My aunty for some reason has kept my grans debit card. My DM is trying to say she don't want to point the finger but is now becoming concerned. She has told me one of the aunties has took forms/docs to do with my grans house. My gran is worried and was on the phone to 1 or them when my DM was there and they are denying they have no forms. Also 1 of the aunties and her husband has been done for benefit fraud a while ago and it was a large some of money so I feel like I wouldn't put things past them.
So my question is how do we gather evidence if there has been wrong doing? Or to check that all my grans finances are ok. I obviously don't want to go in all guns blazing if I have no hard evidence.
Sorry for the long complicated post