Trade union Mandate has written to Dunnes Stores seeking clarification on the company's redundancy policy.
This follows reports the supermarket chain has been offering workers a voluntary redundancy package.
Mandate believes there is no need for redundancies as the company is profitable and claims the redundancy package being offered, which is said to be equivalent to a statutory entitlement, was too little.
Mandate's assistant general secretary Gerry Light said: "We've written to Dunnes to seek clarification on a number of matters”.
“Firstly we want to establish whether there is a legitimate case for redundancy, and if so, it is our firm view that the financial ability of Dunnes Stores based on current profit levels affords an opportunity to offer terms far in excess of statutory levels when dealing with proper redundancy situations,” he said.
"If it turns out there is no reasonable ground to support a redundancy programme initiative, we must challenge the primary motive behind it and question whether management have once again placed corporate interests ahead of their workers and the common good."
Dunnes Stores declined to comment on the matter.