Nearly all invoices and credit memos from customers within the receivables management component are integrated with the sales order management component.
In certain cases, invoices and credit memos can be entered into the receivables management subledger with no reference to a sales order. These are referred to as miscellaneous invoices.
Select the play button to learn about posting invoices and credit memos in SAP S/4HANA Cloud, public edition system.

When you post the customer invoice or credit memo, the Customer account in the subledger is updated and the G/L account for Receivables is simultaneously updated. Thus, the subledger and G/L account are always in balance.
Note
You can only post a balanced invoice/credit memo.Foreign Currency Invoices
It’s possible to enter invoices in foreign currencies.
Select the play button to learn more about posting foreign currency invoices in SAP S/4HANA Cloud, public edition system.