Swedish Radio claims that it has evidence that the Foreign Ministry knew about problems associated processing visas for over a year but took no action.
In total, 70 visas for Afghan nationals were falsely issued, mostly in 2015, according to the Migration Agency.
The investigation shows that the man, among other things, changed a colleague's correct visa refusal to consent, and approved numerous fake documents. They were so clumsily made that they were dismissed as fakes immediately by the immigration agency.
The investigation also found that the people who used the false documents in several cases sought asylum in Sweden and it is all connected to professional smuggling.
"It is extremely serious. All situations where officials violate the rules intentionally and falsely grant permits is extremely serious," says Magnus Rodin, the the Migration Agency Acting Regional Manager Stockholm, to Swedish Radio.
The suspect is employed at the Swedish Migration Agency, but he was on leave during the time he worked for the Foreign Ministry at the embassy.
The Migration Agency's oversight unit has now recommended that the man should be fired and prosecuted. But the Staff Disciplinary Board is awaiting a more thorough investigation before deciding.
The man denies the claims and his lawyer, Jan Södergren, told Swedish Radio that the allegations are "outrageous" and "unfounded".