Issue a compliant receipt when bookings close

When a booking closes, you can now issue a sequentially numbered receipt that meets the statutory numbering rules, with no gaps or repeats. It doesn't report to the tax authority yet, and if you already have automatic invoicing running (Billingo, Számlázz.hu, or your own system), no receipt is created for that booking, so you never end up with two documents for one payment. Turn it on under Settings → Invoicing, then find every issued receipt on the Receipts page. Open Receipts