By Mike Dunn

PHILADELPHIA (CBS) — Philadelphia officials are warning city residents to watch out for a scam artist who’s been knocking on doors, posing as a city building inspector, and demanding cash.

READ MORE: 2 Suspects In Custody After Shooting Near Lincoln High School Left Man Killed, 16-Year-Old In Critical Condition, Police Say

Carlton Williams, commissioner of the city’s Department of Licenses & Inspections (“L&I”), says they’ve received three reports since Monday of a person posing as an L&I inspector and gaining entry to homes:

“He’s displayed a badge, and he’s using information about the property stating that there are violations, and that the city will take certain actions if conditions aren’t met — usually an exchange of money.”

Williams says in two instances the victims got suspicious and refused, but the third victim handed over about $91.

READ MORE: University Of Delaware To Host Campus Safety Event On Gender-Based Violence Following Last Week's Arrest Of Brandon Freyre

There were no reports of violence in any of the incidents, which took place in North Philadelphia, Northeast Philadelphia, and Northwest Philadelphia.

The suspect is described as a middle-aged African-American male, partially bald, and without glasses.

Williams says if you spot the scam artist, immediately call 911.  And he reminds residents that L&I inspectors have photo IDS with their name and will never ask for money.

MORE NEWS: John Dougherty, Bobby Henon Corruption Trial Resumes Tuesday