The company is reacting to weekend newspaper reports focusing on the 'small print' on their website, in relation to the use and storage of data.
It' is in the process of sending out 'application packs' to households around the country, with the first bills expected to arrive in January.
Spokesperson Elizabeth Arnett is adamant they will only use information in specific ways.
“We will not be selling that data” she said.
“We are an arm of the State and we're gathering data for very particular reasons in order to ensure our customers get an accurate bill from us – and there is no case or question in relation to PPS numbers, or any customer data, being sold on on in the way that it was described in the Sunday papers” she added.
