Legislation to clamp down on large student loan defaulters travelling overseas passed its third and final reading in Parliament on Thursday.
Revenue Minister Peter Dunne told Parliament data will be able to be shared with Customs to identify those with large debt who are at the border.
He said customs would be able to forward contact details of those people on to Inland Revenue to follow up.
The Student Loan Scheme Amendment Bill No 2 also broadens the definition of income for repayments, to include income from trusts.
It was passed by 105 votes to 15.