: No punctuation should be used in the address block, except for the hyphen used in a ZIP+4 code (e.g., 12345-6789).
: A properly composed file must contain records in a specific sequence, typically sorted by the Employer Identification Number (EIN) in ascending order. 45.zip
: "Print files" (files that include printer control characters) are not acceptable. Alternative Context: Mailing & ZIP+4 : No punctuation should be used in the
: Standard text for a 5-digit ZIP identifies the specific post office for delivery, while ZIP+4 adds four digits to identify a specific geographic segment like a city block or office building. zip format? 45.zip