certificate of commendation; testimonial
A formal document awarded to recognize achievement or contribution, such as in schools, workplaces, or community events.
He was awarded a certificate of commendation for his many years of volunteer work.
Certificates of commendation were presented to the top-performing students at the graduation ceremony.
The principal presented the winning team with a certificate of commendation.
He received a certificate of commendation for his years of contribution.
The mayor awarded a certificate of commendation to the volunteer group.