The sources, however, said this was part of the routine communication sent to political parties every year to ascertain whether the outfits have violated the provisions of the Foreign Contribution Regulation Act (FCRA).
The officials made it clear that these were "not show cause notices" and a decision in this regard would be taken only after the replies were received from the political parties.
The Aam Aadmi Party, which was served the notice last week, had alleged that the BJP-led Central government's move was a clear case of "political witch hunt" and that it was very "dangerous" for democracy.
"It is a clear case of political witch hunt. All the agencies at the Centre's disposal have been unleashed against the Aam Aadmi Party (AAP), its government in Delhi and its ministers, which is very dangerous for democracy," the party had said in a statement.