Reports TMZ:

We’ve learned the D.A. is alleging in legal docs Chris Brown may have LIED when he claimed he had performed all of his community service in connection with the Rihanna beating case.

Bryan T. Norwood, the Chief of Police in Richmond, VA., wrote a letter to the judge on September 14, claiming Brown successfully completed 202 days of community service — he was only required to perform 180.

Norwood attached documents showing that Brown frequently worked at Tappahannock Children’s Center — a place where Brown’s mom was once a director — and did odd jobs such as painting, washing windows, waxing floors, cutting grass and picking up trash.

The judge was suspicious when the document was filed, and sources tell us the D.A. began investigating and found no “credible, competent or verifiable evidence” that Brown did the 180 days community service.

Sources tell TMZ … there’s no way Chris could have performed community service on some of the days, because he was out of the country doing concerts.

The D.A. calls Chris’ documentation “at best sloppy … and at worst fraudulent reporting.”

The D.A. is asking the judge to reject Chris’ alleged Virginia community service hours and make him fulfill his obligation in L.A. County.

By the way, the D.A. claims Chris’ mom was responsible for orchestrating work at the Children’s Center outside of normal operating hours and a key administrator told the D.A. she NEVER saw Chris perform any work at the center.