What information is required on an invoice?

The following correct information constitutes a proper invoice and is required as payment documentation:

  1. Name of vendor and invoice date (vendors are encouraged to date invoices as close as possible to the date of mailing or transmission).
  2. Purchase order number; assignment of an invoice number by the vendor is recommended.

  3. Description, price, and quantity of property and services actually delivered or rendered.

  4. Shipping and payment terms.

  5. Other substantiating documentation or information as required by the contract.

  6. Name (where practicable), title, telephone number, and complete mailing address.

USPTO FAQ - Questions and Answers (07JUN2004)