financial reward for efforts; compensation for work
General term for monetary reward given in recognition of someone's labor or contribution, not limited to legal contexts.
A financial reward was paid to the volunteers.
finder's fee; reward for returning lost property
Legal term under Japan's Lost Property Act: remuneration paid by the owner to the finder of a lost item, typically 5–20% of the item's value.
After turning in the lost item, I received a finder's fee from the owner.