Gatekeepers can hamper the ability of business users and end users to unsubscribe from a core platform service that they have previously subscribed to. Therefore, rules should be established to avoid a situation in which gatekeepers undermine the rights of business users and end users to freely choose which core platform service they use. To safeguard free choice of business users and end users, a gatekeeper should not be allowed to make it unnecessarily difficult or complicated for business users or end users to unsubscribe from a core platform service. Closing an account or un-subscribing should not be made be more complicated than opening an account or subscribing to the same service. Gatekeepers should not demand additional fees when terminating contracts with their end users or business users. Gatekeepers should ensure that the conditions for terminating contracts are always proportionate and can be exercised without undue difficulty by end users, such as, for example, in relation to the reasons for termination, the notice period, or the form of such termination. This is without prejudice to national legislation applicable in accordance with the Union law laying down rights and obligations concerning conditions of termination of provision of core platform services by end users.