The Digital Services Coordinator of destination, in particular on the basis of complaints received or of the input of other national competent authorities where appropriate, or the Board in case of issues involving at least three Member States, should be able to ask the Digital Services Coordinator of establishment to take investigatory or enforcement actions with regard to a provider under its competence. Such requests for action should be based on well-substantiated evidence showing the existence of an alleged infringement with negative impact on collective interests of the recipients of the service in its Member State or having a negative societal impact. The Digital Services Coordinator of establishment should be able to rely on mutual assistance or invite the requesting Digital Services Coordinator to a joint investigation in case further information is needed to take a decision, without prejudice to the possibility to request the Commission to assess the matter if it has reason to suspect that a systemic infringement by a very large online platform or a very large online search engine may be at stake.
