MAW- Worlds First RANCOR RAID CHALLENGE complete

How can anyone know someone else is f2p? Lack of receipts???

Edit: I missed the quoted post. Still, they will provide documentation showing zero spending on request?

Does Spending my cash back from my CC make me F2P as I am not spending money out of my pocket rather the money my CC gives me back for buying other stuff??? If so then I am a 7.3 mil GP F2P with all 4 r7 GLs!!!!!!!!!!!!! Where is my medal?