An account stated is an agreement between parties to an account based upon prior transactions between them with respect to the correctness of the account items and balance due. An agreement may be implied where a defendant retains bills without objecting to them within a reasonable period of time, or makes partial payment on the account.
Here, the plaintiff established its prima facie entitlement to judgment as a matter of law on the second and fourth causes of action, seeking recovery on an account stated, by submitting evidence that the defendant received and retained, without objection, the invoices that the plaintiff sent to him seeking payment for professional services rendered, setting forth the billable hours expended, and identifying the services rendered. In opposition, the defendant failed to raise a triable issue of fact.
Steven Cohn, P.C. v. Freedman, NY Slip Op 00242 (2d Dep't January 15, 2024)