As well as designing and granting new arms, the College tries to answer many requests from people trying to prove that they are descended from an "armigerous" (arms-bearing) person; a person descended in the male line (or through heraldic heiresses) from an armiger may be reissued that ancestor's arms. Special marks called difference marks can be added make the coat of arms different from the arms of their cousins. The college is involved in genealogy and have many pedigrees (family trees) in their records. Anyone may register a pedigree with the college, where they are carefully checked and need official proofs before being altered.
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