"Creative" Proof of Supplier/ Distribution / Manufacturing Agreement

Hello,

We're in a business where we're reselling digital goods, and our suppliers are primarily anonymous - paid in cryptocurrency.

I'm looking for ideas on creative accounting to fabricate this supply documentation.

Most merchant accounts/processors will ask for Distribution / Manufacturing agreement, and for book keeping these Crypto transactions should also be documented.

Anybody been in similar situation, willing to share experience? Would be open to paid consulting/assistance on the matter.