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 weather warning of fog at Heathrow has led to the cancellation several flights between Newcastle and London tomorrow.
A police investigation has been launched after a woman was raped in the Stakeford area.
Gardens in North Yorkshire have made the latest list of "intriguing" protected historic sites.