In Cash Receipts, we can enter a negative payment. The Financial Edge will change the distribution to credit the cash account and debit a revenue account. This will validate and post successfully. But when trying to import a negative cash receipts, we have no option to pick an account to debit. If we put in a negative amount in the import file for the credit account we are met with a validation error on the import and the payment will not import.
We are currently evaluating this issue and will update this article when we have more information.