Jeffrey Epstein crony Ghislaine Maxwell is so impossible to find that a Manhattan judge has taken the rare step of allowing her to be served with a new lawsuit — by email, according to a federal court filing Friday.

Lawyers for Epstein sex-assault-accuser Annie Farmer had griped to federal Judge Debra Freeman that they’ve been trying to find the disgraced British socialite to serve her with the complaint, filed in November, but that she’s done such a good job of hiding that they haven’t been able to get to her, court documents show.

“Plaintiff has attempted to locate and personally serve Maxwell to no avail. Her counsel has conducted extensive public records searches and located various addresses for Maxwell,” Farmer’s lawyers wrote in a Jan. 27 motion imploring Freeman to allow them to serve Maxwell using “alternate” means.

On Wednesday, Freeman granted the motion, acknowledging that Farmer has “adequately demonstrated that personal service would be impracticable” and ordering Maxwell to be served by email and through her lawyer’s online account used in a lawsuit involving another key Epstein accuser, Virginia Giuffre.

Farmer’s lawyers promptly emailed a copy of the summons and complaint to Maxwell’s email, as well as the other attorney.

“Ms. Maxwell, Please see the below text order granting our motion to approve alternate service on you in Farmer v. Indyke,” reads the email, which was filed to the court as evidence.

If Maxwell’s camp doesn’t respond to the suit by March 6, a default judgment will be placed against her, Freeman ruled.

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Farmer’s lawyers have said they know she’s out there because she’s been “actively participating” in the defamation suit involving Giuffre, which was filed against her in the same court, and is “vigorously fighting” the release of documents in that case, the records state.

Farmer’s lawyers told The Post that they are elated to finally serve the elusive alleged abuser.

“We just don’t think she should be able to dodge the law,” said one of the lawyers, who asked not to be named.

Farmer’s suit alleges she met Maxwell and Epstein through her older sister, Maria, who’d been hired by the billionaire to purchase art for him.

Epstein began taking an interest in Annie when she was around 16 and eventually invited her to his remote New Mexico ranch, where Maxwell pressured her to get naked and then “touched intimate parts” of Farmer’s body and “groped her” under the guise of a massage, court documents allege.

Maria was also allegedly abused later on by both Epstein and Maxwell, but she is not named as a plaintiff in this suit.

Epstein died in federal lock-up in August.

Maxwell is facing at least one other civil suit in federal court in Manhattan, where her buddy Epstein had an Upper East Side townhome.

Her lawyers could not be immediately reached for comment.

Farmer is seeking undisclosed damages.