If a sale is tendered for $0.01 or $0.02 or -$0.01 or -$0.02, and tendered with "Cash & Cheque Receipts" selected as the payment method, BusinessVision will apply penny rounding and will round the total to $0.00.
This will post a journal entry that does not include a payment method, which will fail Data Validation within BVs own Data Validation report.