accredited — appointed and having official credentials
attributed — to regard as resulting from a specified cause; consider as caused by something indicated (usually followed by to): She attributed his bad temper to ill health.
qualified — having the qualities, accomplishments, etc., that fit a person for some function, office, or the like.
ascribed — Simple past tense and past participle of ascribe.
official — a person appointed or elected to an office or charged with certain duties.
recognised — to identify as something or someone previously seen, known, etc.: He had changed so much that one could scarcely recognize him.
recognized — to identify as something or someone previously seen, known, etc.: He had changed so much that one could scarcely recognize him.
certified — holding or guaranteed by a certificate
approved — An approved method or course of action is officially accepted as appropriate in a particular situation.
