See certify
certifying - verb
certifying - thesaurus
attest
demonstrate
endorse
evidence
indorse
licence
license
manifest
Scrabble score = 19
Please note that scrabble only allows seven tiles to be placed at once.
"I ran the trial with a small group of students over three weeks before the summer holidays," she says. "I quickly saw the benefits, and signed up."
King's Leadership Academy, Warrington