31 Pa. Stat. § 700j-405
Before refusing to grant or to reissue, or before suspending, revoking, or refusing to transfer a license, the board shall afford the applicant or the licensee, respectively, an opportunity to be heard. It shall direct a citation to such applicant or licensee, by registered mail, sent to his last known address, giving therein at least five days' notice of such hearing, and a statement of the matters complained of. The direction of such citation by registered mail as aforesaid shall be sufficient notice of such hearing, notwithstanding any refusal of the addressee to accept or receive said citation. The five days' notice shall be computed as from the time that the addressee accepts or receives or refuses to accept or receive said citation. After such hearing, and upon entry of any order thereon, the board shall serve a certified copy of such order upon the applicant or licensee, filing at its office the original and a statement in writing of the findings of fact in support thereof.
31 P.S. § 700j-405