Penn. C.C.R.C.P. 2232.1
As amended through February 1, 2024
Notice required by Pa.R.C.P. No. 2232(a) shall consist of a copy of the complaint and a statement that the person to whom it is addressed is required to join therein within twenty (20) days after receipt of such notice; or his cause of action will be barred and the action will proceed without him. Proof of service shall be by affidavit accompanied with a copy of the notice and the return receipt filed with the Prothonotary.
Penn. C.C.R.C.P. 2232.1