Postmaster General Patrick Donahoe reports the agency will be unable to make a required $5.5 billion payment to the Treasury at the end of September.
But the Office of Personnel Management says the White House may delay the payment for 90 days as part of a larger economic package in the works.
Postal spokeswoman Yvonne Yoerger said she had no details of the plan and that a long-term solution will still be needed.
