A promise, On the flip side, is usually a assure or assurance from the manufacturer or vendor which the product will work as explained or fulfill unique quality standards. bond guarantee guaranty certify pledge warrant deal undertake insist insure testify (to) vow attest stipulate declare swear adhere assert witness vouch https://inspirationpond.de/garantieverlangerung-langerer-schutz-fur-ihr-fahrzeug/