testimonial

noun

1. A statement, especially one given under oath; testimony.

   “The witness provided a written testimonial to the court.”

2. A (usually written) recommendation of someone's worth or character.

   “The company website features a customer testimonial.”

   “"Then why don't you take him into the parlour?" grumbled the ex-driver. His face was a testimonial of hard work and general sobriety but at the moment one might hazard from his voice and manner that he had been drinking earlier in the day.”

3. A tribute given in appreciation of someone's service etc.

   “He gave a moving testimonial at the retirement dinner.”

4. A match played in tribute to a particular player (who sometimes receives a proportion of the gate money).

adj

1. (not-comparable)Serving as testimony.

   “a testimonial statement”