Investigation into Onestream’s compliance with mis-selling and slamming rules

20 December 2019


Investigation into Onestream Limited (Onestream)
Case opened 22 January 2019
Case closed 05 December 2019

This investigation examined whether Onestream complied with its obligations under General Condition (‘GC’) C7.3(a) by ensuring that it did not engage in mis-selling and slamming.

We found that Onestream contravened GC C7.3(a) by placing transfer orders to switch customers home phone services without their permission and in doing so, it engaged in Slamming.

Relevant legal provision(s)

GC C7.3(a) and (b) (and General Condition 22 under the general conditions in force prior to 1 October 2018)

Ofcom has today published a non-confidential version of the Confirmation Decision issued to Onestream on 5 December 2019.

Confirmation Decision under section 96C of the Communications Act 2003
(PDF, 661.3 KB)

Case leader

Rapinder Newton (email:

Case reference CW/01234/11/18