Account postings form an integrated part of SAP accounting. All transactions entered in the sub ledger accounts end up as general ledger postings in SAP. Thus, a posting to sub ledger account say account receivable, account payable will have an effect on the general ledger. As a rule, any accounting transaction, which affects the general ledger invariably results in a GL account posting.

But how does SAP recognize the correct GL account to be posted based on the sub ledger transaction entry. SAP recognized every transaction or entry in the sub ledger as a line item. Having said that, each line item has a unique account number, amount, and posting key. SAP FIGL uses this information in identifying the account to be posted. Similar to account postings, documents created in other modules such as production planning, sales & distribution, materials management, controlling, also get posted if they affect the general ledger i.e. SAP GL. A user in SAP does not even have to manually post a document / line item. SAP can be configured for automatic posting though an option is available for manual posting as well.

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