Alert

Due to a lapse in appropriations, the NRC has ceased normal operations. However, excepted and exempted activities necessary to maintain critical health and safety functions—as well as essential progress on designated critical activities, including those specified in Executive Order 14300—will continue, consistent with the OMB-Approved NRC Lapse Plan.

NRC Form 531 - Request for Taxpayer Identification Number

Form Number:	NRC Form 531
Form Title:	Request for Taxpayer Identification Number
Current Edition:	09-01-2025
Authority, Directive or Regulation:	N/A
Form Status:	Approved by OMB: 3150-0188, Expires: 09/30/2025
Special Instructions:	Instructions and additional information pertinent to the completion of the form appear throughout the form.

Page Last Reviewed/Updated Tuesday, September 16, 2025