November 18, 2019 | 5:24pm

Federal regulators slapped Mayor Invoice de Blasio’s failed presidential marketing campaign with new questions Monday about its fundraising techniques — two months after he dropped out of the race.

The Federal Election Fee wrote his federal political motion committee, Equity PAC, Sunday flagging $123,000 in “apparent excessive contributions.”

Hizzoner’s marketing campaign reimbursed the federal Equity PAC for polling bills — however failed to chop the test by the deadline, in accordance with the letter that was filed by the FEC.

Reimbursements are allowed however had been required by not more than 30 days after de Blasio declared his nationwide candidacy on Might 16.

Exterior of that month-long window, contributions from political committees are restricted to $5,000 a 12 months, the letter states.

The reimbursement from the perpetually tardy mayor occurred about two weeks too late, on June 30.

The FEC letter warns that failure to “adequately respond” by Dec. 23 “could result in an audit or enforcement action.”

It provides that deadline extensions usually are not allowed.

This criticism is separate from one other FEC probe into de Blasio’s use of his state political account to pay for a few of his presidential marketing campaign’s bills.

Jon Paul Lupo, a de Blasio spokesman, mentioned “immediately’s letter a couple of fee that was correctly reported 4 months in the past by each Equity PAC and De Blasio 2020 is neither new, nor conclusive.

“We will continue to work with the FEC on any pending issues about reimbursement timing,” Lupo mentioned.