I'm not tiptoeing around anything.
Do you want projects to provide screenshots of receipts? Or could you share an example template that projects could use? I'm thinking not many people are familiar with GAAP. I looked at your conversation with Marky and he seemed willing to provide you with a cost breakdown but you wanted it in a specific format, so it could be easier if you can provide the format.
Double entry bookkeeping is simply a ledger with income and outgo recorded as they occur on a regular (usually monthly) basis. Marky doesn't see the need for his project because almost all the expenses are simply his labor, and he's grossly undervaluing that for the sake of getting the project funded. I'm not concerned he might be pocketing funds out of turn and demanding the actual ledger to keep him honest, but certain he'll pocket fewer funds than he should be for the work he provides, and requesting he use the ledger format to demonstrate that DHF proposals are able to.
Every mom and pop shop uses double entry bookkeeping, so anyone that has ever been in business is familiar with it. That's GAAP, and it's not difficult for folks that aren't committing shenanigans to do, because it's just writing down what the receipts for expenses actually are, and what the income actually is. During an audit of the books, then the receipts are compared to the ledger, but aren't provided otherwise.
I'm confident an audit of VP is warranted because there are credible allegations of fraud that have not been addressed substantively by the VP principals responsible to manage DHF funds.