Credible means something that is believable or capable of being believed; believable. For example, credible evidence refers to evidence that is worthy of belief or trustworthy. In the question this means that the sponsor denial or the explanation of it, is believable or trustworthy.
not credible!
more credible, most credible
That is the correct spelling of "credible" (believable).
Denial of materialism
Facebook is both, a credible site + an non credible site
Denial - outright rejection. --- Note that denial is also used in the sense of dogmatic refusal to believe (something). Well known examples include Holocaust denial and climate change denial.
He was denial of women rights. He was in denial of his committed bad deeds. He committed the act even though of his continuous denial.
Frank was your sponsor
denial clause
There is no such word, or a need for one. The word "sponsor" is already a noun applied to a person, group, or company.
The duration of The Denial is 3000.0 seconds.
The "denial" of an act is called "Verleugnung" or "Bestreitung".The "denial" of article is called "Entziehung" or "Weigerung".The "denial" of acknowledgment is called "Aberkennung".