New York State Law requires any person who performs a Marriage Ceremony within the City of New York to register with the City Clerk. Forms ; Summons extra caption.PDF ; Complaint sample. A typical NYC co-op board application will require three to six personal and professional reference letters per applicant. Wondering how to write the perfect coop reference letters? We've collected some reference letters from buyers who successfully landed their desired co-ops. We've redacted contact information and any identifying details. Trying to write a membership renewal letter but don't know where to start? The PDF version of these forms are FILLABLE. They can be filled out electronically, then printed.