The word for today is…
testimonial (noun, adjective):
noun
1a: a statement testifying to benefits received
b: a character reference : letter of recommendation
2: an expression of appreciation : tribute
3: evidence, testimony
adjective
1: of, relating to, or constituting testimony
2: expressive of appreciation or esteem
Source : Merriam -Webster
Etymology : In 1639, Scottish poet William Drummond responded to the politics of his day with a cheeky set of new laws, including one stipulating that "no man wear a ... periwig, unless he have a testimonial from a town-clerk, that he is either bald, sickly, or asham'd of white hairs." Testimonials take different forms, but always, like in Drummond's facetious law, they provide affirmation or evidence. (Testimonial traces to Latin testimonium, meaning "evidence" or "witness.") In the 19th century, testimonial developed a new use, referring to a tribute—that is, a gift presented as a public expression of appreciation. Today, testimonial is most often used to refer to a statement—such as one posted on any number of websites devoted to consumer reviews—that endorses a product or service.
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