noun
- a signature added to a document that has already been signed by another person, especially to verify or authenticate it
Usage: formal; legal
Examples
- The check required a countersignature from the department head.
- All expense reports over $500 need a manager’s countersignature.
- The contract was invalid without the lawyer’s countersignature.
- She provided her countersignature to authorize the transaction.
- The bank required a countersignature for the large withdrawal.
- His countersignature confirmed the authenticity of the document.