Field help (SIH0BPCIN) 

Code of the customer requesting the invoice in the case of a direct invoice.
It is managed in the customer table. It must be active. It can be of normal or miscellaneous type. It cannot be modified after the lines are entered. In the case of an order or delivery invoice, it is the original invoice customer. It cannot be modified.

It is possible to search a customer or several customer grouped under the same criteria by selecting Quick customer search. A list of matching items is generated on tabulating to the next field.
For a more advanced search, all fields present in the block can be entered. The list of matches is narrowed down with each tabulation.

When creating an invoice, you can select:

In the case of service contract invoicing, the creation date triggers the execution of processes related to service contracts:

The documents are exclusive to one another. You cannot invoice both delivery notes and orders.

When creating a credit memo, it is possible to select:

Here, too, the documents are exclusive to one another.

When creating a cancellation invoice, you can select one or several invoices. The cancellation applies to each invoice as a whole and you cannot select lines one by one or modify them.

SEEINFO If you cannot select two documents of the same type for the same invoice, it is mandatory to specify the following information for these two documents: sales site, currency, pay-by customer, group customer, price type, tax rule, project code, payment terms, discount code.