An applicant for a default judgment must submit proof of service of the summons and complaint, proof of the facts constituting the claim, and proof of the defaulting defendant's failure to answer or appear. Where the complaint is not verified, the requisite proof must be set forth in an affidavit made by the party.
Deutsche Bank Natl. Trust Co. v. Silverman, NY Slip Op 08990 (2d Dep't December 18, 2019)
Here is the decision.