The announcement came as a response to submissions to the We The People website, which promises to address any petition that gains 5,000 signatories.
Two petitions called for disclosure of government information on ETs and an acknowledgement of any contact.
The White House responded that there was "no evidence that any life exists outside our planet".
More than 17,000 citizens joined the two petitions, and the White House has since amended the requirements for response to a minimum of 25,000 signatories