Paypyrus being based on Venmo, we cannot guarantee payment if the bill creator decides to revoke our authorisation or delete the bill. This is due to Venmo&#x27;s friend-to-friend model, which we are based on. No bot accounts are allowed, so the money is never placed in our hands. It is a direct P2P payment between friends, presumably.<p>This would be analogous to a bank check rather than a paper bill. Since it is not legal tender and there is no middleman in the transaction, it could not be spent (or stolen) as easily as a dollar bill.