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The information here is specific to NASA

Effective December 1, 2009, the NASA Shared Services Center (NSSC) was designated as the Finance Office for inquiries on all Letters of Credit. Department of Health and Human Services Payment Management System (PMS) will remain the designated billing office for all payments.

If you have any further questions, please contact the NSSC at 1-877-NSSC123 (1-877-677-2123) or by email at:

NASA Shared Service Center

Customer Contact Center


Fax: 1-866-779-6772

NASA has implemented an early cut-off for drawdowns each month. All NASA payment requests must be requested in the Payment Management System on the 26th* of each month by 4:30 p.m. US Eastern Time. If the 26th of the month falls on a Saturday, Sunday or federal holiday, payment requests must be made on the preceding Friday. The Payment Management System will re-open for NASA drawdowns on the first business day of each month. For questions, please contact your NASA Center point of contact or your PMS Liaison Accountant.

*Note: there is an earlier cut-off for the month listed below:

  • December 2016 - December 23, 2016, last day to draw for this month
  • February 2017 - February 23, 2017, last day to draw for this month
  • March 2017 – March 24, 2017, last day to draw for this month
  • May 2017 - May 25, 2017 last day to draw for this month
  • August 2017 – August 25, 2017, last day to draw for this month