Default Judgment.
(a) Default and entry. When a defendant has failed to appear, plead or proceed to trial of an action reached and called for trial, or when the court orders a dismissal for any other neglect to proceed, the plaintiff may seek a default judgment against him. If the plaintiff's claim is for a sum certain or for a sum which can by computation be made certain, application may be made to the clerk within one year after the default. The clerk, upon submission of the requisite proof, shall enter judgment for the amount demanded.
(f) Proof. On any application for judgment by default, the applicant shall file proof of service of the summons and the complaint, or a summons and notice served pursuant to subdivision (b) of rule 305 or subdivision (a) of rule 316 of this chapter, and proof of the facts constituting the claim, the default and the amount due by affidavit made by the party.
3. (i) When a default judgment based upon nonappearance is sought against a natural person in an action based upon nonpayment of a contractual obligation an affidavit shall be submitted that additional notice has been given by or on behalf of the plaintiff at least twenty days before the entry of such judgment, by mailing a copy of the summons by first-class mail to the defendant at his place of residence in an envelope bearing the legend "personal and confidential" and not indicating on the outside of the envelope that the communication is from an attorney or concerns an alleged debt.
