Colorado’s top election official Saturday filed a federal lawsuit against the United States Postal Service over mailers that contain incorrect election information for state voters.

Jena Griswold, Colorado’s secretary of state, said that her office learned Thursday that the postal service would be sending out pre-election mailers to every household in America — but that the information on the cards does not align with state election rules.

“This attempt at voter suppression violates the United States Constitution and federal statutes and must be stopped immediately,” Griswold and state Attorney General Phil Weiser alleged in the complaint filed in U.S. District Court in Denver.

Griswold also filed a motion for a temporary restraining order, seeking to block the postal service from sending the mailers.

David Rupert, a postal service spokesman, told The Denver Post that a handful of Colorado communities — totaling in the thousands of households — received the postcard Thursday and Friday, with the rest set to receive it next week.

It’s all part of a national campaign through Election Day to “educate the public on the Postal Service’s role in the mail-in ballot process,” he said in an email. “The non-partisan campaign neither encourages nor discourages mail-in voting; rather, it is designed to reach and inform all voters about the importance of planning ahead if they plan to vote by mail.”

“Some of it applies to everybody and some doesn’t,” Rupert told The Post. “It’s meant for people to prepare.”

But Griswold argues in the lawsuit that “these false statements will disenfranchise Colorado voters, including its uniform military and overseas voters; mislead them about Colorado’s election procedures; infringe Colorado’s Constitutional rights to conduct its elections; and interfere with the Secretary of State’s ability to oversee Colorado elections. These false statements will confuse Colorado voters, likely causing otherwise-eligible voters to wrongly believe that they may not participate in the upcoming election.”

The secretary of state ticked off a host of items on the mailer that are not true for Colorado.

“The mailer incorrectly asks that voters request a mail ballot 15 days before the election and return their ballots by mail at least seven days before the election,” Griswold said in a news release. “In Colorado, every registered voter is sent a ballot without having to make a request and voters are urged to return ballots by mail sooner than seven days before the election. My office asked USPS officials to delay or not send the mailer in Colorado, but they refused to commit to that.”

In a Twitter thread Friday night, Griswold said secretaries of state asked Postmaster General Louis DeJoy to review a draft of election information to ensure accuracy before it was sent to voters. But DeJoy, she tweeted, refused.

“This may have started off as a well-intentioned effort by @USPS, but their refusal to listen to election experts combined with the recent postal slowdown in some parts of the country is beyond suspect,” Griswold tweeted.

Election officials in California and Washington expressed similar concern that the pre-election mailers are providing voters with the wrong information.

California Chief Deputy Secretary of State James Schwab tweeted Friday night that the postcard “could be confusing for California,” noting discrepancies in the postal service mailer with several of the state’s ballot-return policies. Sacramento County issued its own statement, assuring voters that they do not need to request a mail-in ballot in order to receive one.

Washington’s secretary of state Kim Wyman said in a statement Friday that her office was “not made aware this mailer would be sent” to state residents, saying voters there also are not required to request a ballot in order to vote.