PITTSBURGH (KDKA) — No store owner would want their business to be unsafe.

So when a man went into several restaurants in downtown Pittsburgh, claiming to be a private fire inspector, employees invited him in.

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“There are many third party private companies that are legitimate companies, that work under contract for various businesses,” Pittsburgh Bureau of Fire Chief Darryl Jones said.

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Authorities say last Wednesday, a man hit up the Bruegger’s Bagels in Market Square, then the Subway on Liberty Avenue. He claimed to be testing fire extinguishers for “Metro Fire Prevention.”

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“Walked around a little bit, came back with an invoice and requested $400 in cash,”  Chief Darryl Jones said.

The employees paid up. The problem is “Metro Fire Prevention” doesn’t exist.

The lesson here, Chief Darryl Jones said, is to always ask a worker for credentials when they walk in to your home or business.

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“I’m thinking that if they’re under contract with you, they will probably bill you. I doubt very seriously they would ask for cash.”