Queenstown police have arrested three people within 24 hours for altering their season passes in an attempt to get free transport on the ski fields.
In three separate incidents, the police were called when ski staff noticed the passes had been changed.
Two Australians and an English tourist have been charged with altering a document, which carries a maximum penalty of 10 years in prison.
All three have lost their ski passes, worth over $900, and are banned from the Coronet Peak, Remarkables and Mount Hutt ski fields for two years.
Police say they will not tolerate fraudulent use of ski passes, including the practice of sharing passes between friends or relatives.