3

In the context of advertising/marketing a testimonial is:

  • Written recommendation from a celebrity or satisfied customer affirming the performance, quality, and/or value of a product or service. Testimonials are one of the most potent tools of marketing. (Business dictionary.com)

What is the term used to refer to someone ( generally a celebrity) who makes a testimonial?

2
  • A witness is a person who offers testimony. A testimonial isn't the same thing, though.
    – jejorda2
    May 24, 2016 at 20:54
  • I would suggest a liar... May 24, 2016 at 23:50

2 Answers 2

6

Consider endorser. Oxford Dictionaries Online defines endorse as

Declare one’s public approval or support of: the report was endorsed by the college

1

When a pejorative term is desired:

sellout

Someone who does something that does not agree with that person's beliefs or values especially in order to make money

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