What forms are used for Customer Number practice?

This page is an FAQ based on guidance from the Manual of Patent Examining Procedure. It is provided as guidance, with links to the ground truth sources. This is information only: it is not legal advice.

The USPTO provides several forms for Customer Number practice:

• PTO/SB/125 – Request for Customer Number
• PTO/SB/124 – Request for Customer Number Data Change
• PTO/AIA/122 or PTO/SB/122 – Change of Correspondence Address, Application
• PTO/AIA/123 or PTO/SB/123 – Change of Correspondence Address, Patent

According to MPEP 403: “The following forms are suggested for use with the Customer Number practice: (A) the ‘Request for Customer Number’ (PTO/SB/125) to request a Customer Number; (B) the ‘Request for Customer Number Data Change’ (PTO/SB/124) to request a change in the data (address or list of practitioners) associated with an existing Customer Number; (C) the ‘Change of Correspondence Address, Application’ (PTO/AIA/122 for applications filed on or after September 16, 2012, or PTO/SB/122 for applications filed before September 16, 2012) to change the correspondence address of an individual application to the address associated with a Customer Number; and (D) the ‘Change of Correspondence Address, Patent’ (PTO/AIA/123 for applications filed on or after September 16, 2012, or PTO//SB/123 for applications filed before September 16, 2012) to change the correspondence address of an individual patent to the address associated with a Customer Number.”