What would be the function of the "check number" on a written check?

The function of the "check number" on a written check is to uniquely identify individual checks. Each check that is issued has a distinct number that allows the bank and the check writer to track and reference that specific transaction easily. This unique identifier is crucial for maintaining accurate records, as it helps to prevent duplication and confusion over multiple checks, especially in cases where more than one check is issued to a single recipient or in cases of reconciliations in bookkeeping.

The importance of the check number extends to ensuring that any disputes or inquiries regarding a particular check can be resolved by referencing this unique identifier. It serves as a critical component of financial documentation and auditing processes.