You can block an invoice manually. You have two options for doing this when you enter the invoice:

• You can block an invoice by entering an R in the field Payment block in the document header data.
• You can block an item by selecting the Ma (manual blocking reason) field in the item list. When you post the invoice, the system automatically sets an R in the field Payment block in the vendor line of the accounting document. Manually blocked items are given the blocking reason Manual block (M).