A process server slapped Lindsay and Dina Lohan with court papers yesterday — part of Chase Bank’s years-long battle to foreclose on their Long Island mansion, sources said.

The server tacked the court papers on the front gate of the troubled star’s childhood house in Merrick, where Dina and Lindsay brawled in October.

The court documents — which a source said names both Lindsay, 26, and her mom, Dina, 50 — were inside an envelope marked simply: “Important Information Enclosed.”

The deliveryman confirmed to The Post that he was a process server and that the papers were related to a “Chase Bank” mortgage issue.

Nine days ago, Radar Online revealed that the “Mean Girls” star was forced to leave Los Angeles and bunk with her mom because she’s broke.

“Lindsay is being forced to live at home with Dina because she can’t afford any other options at the moment,” a source told Radar.

“Lindsay is flat-out broke and can’t even afford to rent a two-bedroom apartment in North Hollywood,” the source added.

Financial woes run in the family. Hard-partying Dina has racked up more than $1 million in debt in the past decade, barely avoiding foreclosure on the $1.3 million house in 2005 and 2012, court documents show.

In October, Lindsay helped her mom pay the loans, plunking down a reported $40,000.

That set off an October brawl between Lindsay and her mother that took place in the driveway at the house. There, the star demanded Dina pay back the huge loan.

“I was like, ‘Give me my money back! Give me my 40 grand back that I just gave you!’ ” the actress said, recounting the fight with her father, Michael, in a phone conversation he recorded.

“You gave Mom $40,000?” Michael asked.

“Because she needs to keep her house,” Lindsay responded.

Lindsay herself owes more than $200,000 in back taxes, which Charlie Sheen reportedly helped her pay in November.

“Thank you Charlie Sheen for having Lindsays back!” Dina tweeted.

But in December, the IRS froze Lindsay’s accounts.

In 2005, Dina Lohan took out a loan totaling more than $700,000 and now holds a $422,723 mortgage on the property, records show. In 2008, she was forced to pay off a $301,715 lien for money borrowed from another lender, records show.

A Lohan spokewoman didn’t return calls for comment.