A posting key is a two-character code used in SAP S/4HANA FI to determine how a transaction is posted. It specifies the account assignment and transaction type. • Examples: ○ 40: Credit to customer (e.g., when a customer pays an invoice) ○ 50: Debit to vendor (e.g., when you purchase goods or services on credit) ○ 70: Debit asset acquisition (e.g., when you buy a new machine for your business) ○ 71: Credit to bank account (e.g., when you deposit a check into your biz. bank account) Posting Key 40: Credit to Customer When a customer pays an invoice, the following double-entry accounting occurs: 1. Cash (or Bank) Account: This account is debited to record the increase in cash balance received from the customer. 2. A/R Account: This account is credited to reduce the outstanding amount owed by the customer. | Account ...