The individual or entity responsible for initiating a check payment is the source of the funds. For example, if a company pays an invoice using a check, the company is the source. This party is identified on the check, though not always explicitly labeled as such.
Clearly identifying the source of funds is crucial for accurate record-keeping, tracking payments, and facilitating investigations in case of discrepancies or fraud. This has been a cornerstone of financial transactions for centuries, evolving alongside the development of modern banking systems. Knowing this source allows the recipient to properly credit the payment and provides a clear audit trail. It also offers legal recourse should issues arise concerning the validity or legitimacy of the payment.