Australian-listed casino operator Crown Resorts Ltd. has been slapped with a AUD300,000 (US$226,608) fine over charges of tampering certain electronic gaming machines on the casino floor.

On Friday, The Guardian reported that the Victorian Commission for Gambling and Liquor Regulation (VCGLR) found Crown Resorts guilty of violating the Gambling Regulation Act of 2003 when the casino operator “adjusted” its gaming machines.

The fine was considered to be the heftiest punishment imposed on the Australian operator, which insisted during the span of the investigation that it had done nothing wrong. VCGLR, however, ruled that the Melbourne-based company needed to secure permission from them before it could alter gambling machines.

“Crown’s failure to obtain approval means it has contravened the Gambling Regulation Act 2003,” the VCGLR said, according to the news outlet. “This is the largest fine the commission has issued to Crown and reflects the seriousness with which it considers the matter.”