The Commerce Commission is seeking to claw back more than $650,000 from a finance company for 1700 borrowers on loan contracts.
The regulator has filed High Court proceedings against Linsa Finance and is seeking orders for it to return costs of borrowing totalling around $680,000.
It is also seeking that Linsa Finance pays damages to affected borrowers for failing to disclose key information required under the Credit Contracts and Consumer Finance Act.
Linsa Finance, which has offices in Manurewa and Tauranga, offers secured and unsecured personal loans of up to $4000.
The commission alleges that between June 2015 and March 2016 Linsa Finance's loan approval contracts failed to include all key disclosure information, which is mandatory in legislation.