The energy bill helps to present a risk of data as "adherent customers" that could send emails from rival companies to make them change
Victoria Bischoff for the Daily Mail
The plans to share loyal customer information with other providers to help households switch to better businesses may violate the data protection rules.
A "sticky customers" database, which has been with the same provider for years, has been suggested by the competition watchman so rival companies can send better deals.
However, the experts were concerned that the addresses would be torn with junk mail.
As part of the proposed plan, the data of faithful customers would be shared among the energy companies so that they can receive offers to change their suppliers
The energy regulator We have tried the idea and said that the letters increased the levels of change.
But an industry administrator warned that sharing client details without permission could break the rules of the General Data Protection Standard.
Now customers should "opt" before companies can contact them. The information manager, the information commissioner (ICO), is evaluating the plans of Ofgem.
An ICO spokesman states: "The ICO has participated regularly with Ofgem … to help ensure that any personal data processing involved in the implementation of these measures is in accordance with the data protection law.
A spokesman for Ofgem says: "Guaranteeing the privacy and protection of customer information is essential for our work to help these customers look for better deals. We will ensure that our work in this field complies with the data protection law.
"We will continue to work with ICO, information security consultants and our legal advisors as we progress work to obtain better results for energy consumers."