third-party
adjective [ before noun ]
ukus LAW
connected with a third person or organization less directly involved in an activity or in a legal case than the main people or organizations that are involved:
third-party commissions/proceedings/suppliers There has been a higher concentration of sales in foreign locations that are subject to third-party commissions.
INSURANCE
connected with insurance that will pay money to a person who suffers loss or damage caused by the insured person:
third-party claims/insurance/liability
third-party cover/damage