Answer: guaranteeing

AnswerCrossword Clue
guaranteeingProvide financial security for; underwrite
guaranteeingGUARANTEE, to give a formal promise that something will be done
guaranteeingPromise with certainty
guaranteeingProvide such an assurance regarding (something, esp. a product)
guaranteeingProvide a formal assurance or promise, esp. that certain conditions shall be fulfilled relating to a product, service, or transaction