testimonial
US /ˌtes.təˈmoʊ.ni.əl/
UK /ˌtes.təˈmoʊ.ni.əl/

1.
témoignage, attestation, recommandation
a formal statement testifying to someone's character and qualifications, or to the merits of a product, service, or claim
:
•
The website features several customer testimonials.
Le site web présente plusieurs témoignages de clients.
•
She received a glowing testimonial from her former employer.
Elle a reçu un témoignage élogieux de son ancien employeur.