The New York Supplement to Certificate of Insurance is a document used to provide additional information to a Certificate of Insurance issued in New York State. It is used to provide additional detail about the coverage and limits of an insurance policy issued in New York State. The New York Supplement to Certificate of Insurance must be signed by the insurance company representative and the insured party. There are two main types of New York Supplement to Certificate of Insurance: 1) New York Statutory Supplement to Certificate of Insurance, which outlines the specific statutory requirements for the insurance policy; and 2) New York Standard Supplement to Certificate of Insurance, which outlines the specific coverage details for the insurance policy. The New York Supplement to Certificate of Insurance is an important document that must be completed in order for an insurance policy to be valid in New York State.