Rule *286 - Notices; Service Of Papers(a) All notices shall be in writing.(b) A copy of every paper filed, excepting accounts, unless otherwise provided by law or the rules of Court, shall be promptly served on the opposing side, as hereinafter provided.(c) Except as otherwise provided by Act of Assembly, rule or special order of Court, whenever any process, paper or notice is required to be served upon a party, such service shall be made in accordance with the procedure set forth in Pa.R.C.P. 233 (editor's note: now Pa.R.C.P. 440 and 441 ), except that in an action begun by capias, service may also be made upon his bail.