A third of people who stayed in MIQ facilities in August haven't fronted up for their costs

Citizens and residents are liable for a charge if they visit the country for less than 90 days.

A single person is charged three-thousand-100 dollars.

The first invoices became overdue on November 26, with 13 out of 39 not paid - to a total of more than 43-thousand dollars.

An MIQ spokesperson says if the person doesn't pay, actions could include referral to a debt collection agency, or court action.

Once invoices are overdue, they become a debt due to the Crown.