Claimant (noun)

A person or organization making a claim or demand, especially for payment of a debt.

Origin:

Late 16th century from latin claimantem, present participle of clamare "to call, cry out".

Examples:

1. The claimant demanded payment for the damage caused by the car accident.
2. The insurance company will investigate the claimant's claim before making a decision.
3. The claimant filed a lawsuit against the company for breach of contract.
4. The claimant presented evidence to support their claim for compensation.
5. The claimant argued that they were entitled to the money owed to them by law.