How do I use a Certificate of Mailing or Transmission?

To use a Certificate of Mailing or Transmission, you must include a signed certification with your correspondence. The MPEP provides suggested formats for these certificates:

“The following are suggested formats for either a Certificate of Mailing or Certificate of Transmission under 37 CFR 1.8(a). The certification may be included with all correspondence concerning this application or proceeding to establish a date of mailing or transmission under 37 CFR 1.8(a).”

The certificate should include:

• A statement certifying the date of mailing or transmission
• The signature of the person making the certification
• The application number (if known)

It’s important to note that the certificate must be signed by someone with a reasonable basis to expect the correspondence would be mailed or transmitted on or before the date indicated.

To learn more:

• Certificate of Mailing
• Certificate of Transmission
• USPTO Correspondence
• Patent Filing Procedures