"honor certificate" is correct and usable in written English.
You could use it to recognize someone for an impressive achievement. For example: "The student was awarded an honor certificate for her superior performance in the competition."
It's quite possible employers would be happy with an honor certificate.
"I thought it was my Medal of Honor certificate, which I've been requesting for years," said Mr. Serpico, who was awarded the medal after being shot in 1971 during a drug arrest in a Brooklyn building in which fellow officers did not provide immediate backup or medical help.
He was awarded the SAMPE Society for the Advancement of Materials Technologyy) honor certificate, the 'G.
And, as always, those Medal of Honor certificates hanging on the wall.
Four Medal of Honor certificates, a letter from Abraham Lincoln and an old Civil War recruitment poster ("Go to the front with your friend!") hang from the walls.
Illustrating a substantial increase of 20% in local television productions among the Emmy nominee class of 2016, Los Angeles City Councilman Mitch O'Farrell and six major entertainment industry stakeholders rendered the City Council's Made In Hollywood Honors certificates to 18 nominated shows which were filmed in Hollywood or elsewhere in California.
Acceptable: Posting your child's honor roll certificate on your refrigerator.
On the center console in front of her was the honor roll certificate, which Lee had carefully tucked under her Bible.
Mrs. Gordon's master's thesis in library science from C. W. Post, a 1946 report card along with an honor roll certificate from Bayside High School were in another bag.
Prior to her current role, Ms. Woodburn attended Georgetown University where she earned a M.A. in Communication, Culture, and Technology and an honor's certificate in International Business Diplomacy.
It was there, on those same walls, that she had taped her honor roll certificates.
