Aviva faces a battle with union Amicus over plans to axe two RAC call centres as part of 1,700 job cuts.
This week Aviva said 210 posts will go at Darlington by April 2006 and another 120 will be lost at Morecambe in November this year as the insurer merges with the RAC.
Although Aviva mentioned the number of planned job cuts in March, Amicus said workers at both centres were only informed of redundancies the day before they occurred and that the union was not given a chance to consult over terms.
Amicus's national secretary David Fleming said "the staff at RAC are understandably shocked."
Aviva has now said it is talking to both the affected employees and Amicus.
No one at Aviva was available for comment.