Council member Jack Evans’ mayoral campaign is under scrutiny again, this time for potentially exceeding the city’s donation limit.

The city is probing three separate checks that appeared to be from one donor, the Washington Post reported Wednesday. Evans said he thought the investigation, which began last month, was a “routine observation” to determine if checks were mistakenly duplicated.

“I haven’t heard anything at all, and we were never contacted” about an investigation, Evans said in a phone interview Wednesday.

Contributions to lawmakers’ “constituent services” fund are capped at $500 per year under D.C. law. That fund affords lawmakers wide leeway over how its spent.

Evans’ fund had about $22,500 on hand, according to his most recent filing in July. He spent just over $18,000 in the first half of 2013, the filing shows.

Evans was also the subject of a preliminary inquiry last week, after a local leader and GW senior accused him of turning over a public alley to GW in exchange for support in his mayoral campaign.

Wesley Williams, a spokesman for the D.C. Office of Campaign Finance, declined to comment.

“All matters involving an investigation are confidential until they are completed,” Williams said.

Evans has faced criticism in the past for spending more than $100,000 from his constituent-service fund for sports tickets.