Simple past tense and past participle of certify.(verb)
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Use "certified" in a sentence
"You can expect to see the same level of quality in certified child care when you move from one installation to another."
"One of the buyers offered only $60 — significantly less than even its bullion melt value — for a 1925-D Indian Head $2.50 gold coin certified NGC MS66 and valued at $10,000 by PNG experts."
"DGS offers a number of unique features including AuthentiView ™ and online Visual Population Report of every coin certified with a value over $100."