The co-worker was accused of "creating a hostile work environment" and "conduct unbecoming of a federal employee," citing 60 instances of flatulence since September.
The employee blames the flatulence problem on lactose intolerance.
The letter was originally posted on The Smoking Gun website, with names blacked out.
A Social Security Administration spokesman said Friday, in a two sentence email, that the reprimand was rescinded a week after it was issued "when senior management became aware" of it.
The spokesman said the agency could not comment further.
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