Mailing of notices, orders or decisions of a referee, or of the Board to the parties at their last known addresses, or issuance by electronic transmission when permitted by law and this chapter, as furnished by the parties to the referee, the Board or the Department, shall constitute notice of the matters therein contained.
34 Pa. Code § 101.53
The provisions of this § 101.53 amended under section 203(d) of the Unemployment Compensation Law (43 P.S. § 763(d)) and section 506 of The Administrative Code of 1929 (71 P.S. § 186).