Part 3: Enforcement of consumer protection law Online interface notices Section 184: Online interface notices
This section empowers the CMA to give an online interface notice as a last resort to prevent serious harm to the collective interests of consumers where the CMA is satisfied that a person has engaged in, is engaging in, or is likely engage in, an infringing practice (subsections (1) and (5)).
	The notice can be given to the infringer or any third party (subsection (2)). However, subsection (3) sets out a jurisdictional test which limits the CMA’s power to give a notice to a third party overseas who satisfies at least one of the conditions listed in that subsection. See the explanatory note for section 149 regarding the "directs activities ... to consumers in the United Kingdom" limb of this jurisdictional test.
	It is possible that the CMA might give a final infringement notice under section 182 to the infringer and, simultaneously, an online interface notice to a third party (where, for example, the CMA is not satisfied that the giving of the final infringement notice to the infringer would, by itself, be wholly effective and is satisfied that the directions in the online interface notice are therefore necessary to avoid the risk of serious harm to the collective interests of consumers).
	Subsection (4) lists what a person can be required to do through an online interface notice, including displaying warnings to consumers or removing infringing content from an online interface. The meaning of "online interface" is given by subsection (10) and includes websites and apps.
	Subsection (6) sets out certain details which the online interface notice must specify, including:
the CMA’s findings in relation to the circumstances justifying the notice,
the appeal rights of those who have received the notice.
	Subsections (7) and (8) enable the CMA to publicise any online interface notices given under this section and to identify the infringer to raise awareness of that enforcement intervention and stop any continuing effects of the infringement.