The phrase "already certified" is correct and usable in written English.
It can be used to indicate that something has been certified prior to the current moment or context.
Example: "The product is already certified for safety and quality, so we can proceed with the launch."
Alternatives: "previously certified" or "certified in advance".
Clover, a rabbit owned by Mrs. Sizer, is already certified.
Because the gymnastics federation has already certified the results of the gymnastics competition, Rogge said, "For us that is final".
It is uncommon for the F.A.A. to open a review of an airplane it has already certified, but the action on Friday pointed to increased concern by regulators.
The Recepter Bug helmet was designed with features for snow sports and was based on the Receptor helmet that was already certified for biking, water and snow (€120).
The federal judge overseeing the case, Emmet G. Sullivan, had already certified the plaintiffs as a class, although only to seek changes in government practices and policies.
C.A.A. Sports is already certified with the union and, in the N.B.A., is closely affiliated with the Knicks, representing Carmelo Anthony, J. R. Smith and Coach Mike Woodson.
Meanwhile, the Australian government had already begun implementing its part of that deal, under which 4,000 refugees who had already been certified by the United Nations in Malaysia would be resettled in Australia.
About 115 schools nationwide have already been certified as meeting the standard, she said, and the number of those interested is growing every year.
They had already been certified as organic by one of the independent local agencies that are now authorized to grant federal certification.
One American film, Harmony Korine's 1999 "Julien Donkey-Boy," and one French film, Jean-Marc Barr's "Lovers," have already been certified by the Dogma politbureau.
She is on tour to promote "Red" (Big Machine), her fourth album, which sold 1.2 million copies in its first week of release last October, and has already been certified four times platinum.
