FBI Number

May be up to seven numerics or one to six numerics followed by an alphabetic character A through H; or one to six numerics followed by an alphabetic character J through Z, followed by one or two check digits; or one to six numerics followed by two alphabetics followed by one check digit. If the number contains one alphabetic character (J-Z), the check digit(s) will be 1 to 11.  If the number contains two alphabetic characters, the first cannot be B, G, I, O, Q, S, U, Y, or Z; the second must be A, B, or C; and the check digit will be 0 to 9.  The alphabetic characters I and O are always invalid.