Firstsource: Sky TV involved in Londonderry call centre 'data breach' talks
Sky TV has confirmed it is in discussions with the call centre Firstsource in Derry over what it calls "allegations of the incorrect processing of some sales".
It is understood that around 100 workers have been suspended.
BBC Radio Foyle has seen a letter sent by Firstsource to one of the workers.
In it, the worker is accused of mis-selling products and fraud. Firstsource have said an internal investigation is under way.
Firstsource handles customer calls and sells package deals on behalf of Sky.
"There is no evidence for us at this time to suggest that customers have been adversely impacted," a Sky spokesperson said.
"We take all such allegations very seriously whenever customer data is involved and appropriate investigations are being undertaken."
Firstsource said they are aware that a large number of staff were affected in the Derry area.
"A number of policies and procedures may have been breached by members of staff," said a spokesperson.
"We cannot comment on the detail of the investigation until it has been completed."
A trade union has described the suspension of workers as "unprecedented".