testimonial

A statement, especially one given under oath; testimony

The witness provided a written testimonial to the court.

A written recommendation of someone's worth or character

The company website features a customer testimonial.

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

He gave a moving testimonial at the retirement dinner.

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

Serving as testimony.

a testimonial statement