It is illegal to impersonate a member of the clergy.

Section 13A-14-4
Fraudulently pretending to be clergyman.

Whoever, being in a public place, fraudulently pretends by garb or outward array to be a minister of any religion, or nun, priest, rabbi or other member of the clergy, is guilty of a misdemeanor and, upon conviction, shall be punished by a fine not exceeding $500.00 or confinement in the county jail for not more than one year, or by both such fine and imprisonment. (Acts 1965, 1st Ex. Sess., No. 273, p. 381; Code 1975, §13-4-99.)