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
Northumberland has won Silver in the Best UK Holiday Destination/County in the prestigious 2015 British Travel awards last night.
Police from five forces have carried out raids today aimed at stopping an escalating feud in the travelling community.
Newcastle United supporters have the highest number of active banning orders in the Premier League.