Firstsource has confirmed that 300 of the jobs it's proposing to axe are permanent positions.
In all, 542 jobs are at risk. The remainder are contract roles.
The firm has also confirmed that the job losses will be spread evenly across two sites: its Massey Road operation at Barclaycard's offices in Thornaby, and at its own base at Fountain Court in Middlesbrough.
The job losses are in response to falling demand for Payment Protection Insurance claims handling from Firstsource's client, Barclaycard.
More top news
A woman described as being 'allergic to life' has opened a craft centre in Hartlepool to help her cope with her rare condition.
An extreme sports show has rolled into Wearside. The Torque show features everything from monster trucks to motorbikes.
Severe weather has caused untold damage to the region on what was one of the hottest days of the decade.