SAN JOSE, Calif. – An anonymous school employee is blowing the whistle on Bernal Intermediate School Principal Kristina Clecak, alleging she used the school’s credit card to run a jewelry business.

A source inside the Oak Grove School District in San Jose raised issues with Clecak’s credit card use and spending habits last year, prompting NBC Bay Area to request the principal’s expense reports in October.

The records revealed Clecak made 17 charges to the online jewelry company Stella and Dot for several hundred dollars. A note on Clecak’s expense report for November shows the credit card was allegedly used in error.

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District officials forced Clecak to pay the money back, but the inside source contends the principal continued to use the credit card to rack up unauthorized purchases until the news site requested her records in October.

“It’s happened within the last four months,” the source told an NBC Bay Area reporter of district officials revoking Clecak’s credit card privileges. “I truly believe it happened because of your investigation.”

The news site contacted Oak Grove superintendent Jose Manzo, who refused to comment on the issue, citing personnel privacy policy. Instead, he issued a statement that “credit cards in isolated situations were not being used consistent with (district) policy and it took appropriate action.”

Clecak also declined comment, and pointed the news site to the district’s statement.

The inside source told NBC Bay Area Clecak has misused school funds since she became principal at Bernal six years ago, mostly for her side business as a stylist for Stella and Dot.

“Six years of this type of stuff being brought to the administration and nothing being done,” the source said. “It continues year after year.”

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The whistleblower is only the latest to raise issues with Clecak’s leadership at the school, where two thirds of teachers completed a union survey on her performance last year.

Teachers wrote that Clecak is “the absolute antithesis of a leader” who is “unethical and picks on or bullies teachers,” according to the news site.

In total, the survey resulted in 309 responses unfavorable for the principal, according to Josie Carillo-Johnson, former president of the Oak Grove Educators Association.

“That’s huge. That’s an alarming number,” Carillo-Johnson told NBC Bay Area. “Our teachers are held accountable and there was absolutely no accountability for her behavior.”

Current OGEA president Lynne Martinez was also quick to badmouth Clecak.

“They call her the ghost, the ghost principal,” Martinez said. “She’s not seen on campus. She’s not seen in the classrooms.”

The union apparently conducted another survey recently that showed more favorable results, although many of the previous concerns among teachers remained, NBC Bay Area reports.