Liability invoice: Generates an open liability (creditor) that can be closed again via the bank reconciliation.
Liability payment: Settles an open liability (creditor) that was posted through the posting workflow.
Receivable invoice: Generates an open receivable (debtor) that can be closed again via the bank reconciliation.
Receivable payment: Settles an open receivable (debtor) that was posted through the posting workflow.
General ledger: All other postings that do not concern either open receivables or open liabilities.