An authorisation method for the release or blocking of resources, wherein the method comprises the following steps, in case there is no connection between a client and a resource owner: using wireless communication means, transmission of a resource request from a client to a provider, the transmission preferably being made via an agent, using wireless communication means, transmission of an authorisation request from the provider to the resource owner, using wireless communication means, transmission of an identified authorisation request from the resource owner to the provider, using wireless communication means, transmission of the identified authorisation request from the provider to the client, preferably via the agent, generation of a local receipt by the client and, using wireless communication means, transmission of this receipt from the client to the provider, preferably via the agent, transmission of the receipt from the provider to the resource owner, validation of the receipt by the resource owner, and transmission of an authorisation response from the resource owner back to the provider, and release or blocking of the resource by the provider to the client, wherein the method comprises the following steps in case the connection between the provider and the resource owner is temporarily interrupted: using wireless communication means, transmission of a resource request from a client to a provider, the transmission being made via an agent; using wireless communication means, transmission of an authorisation request from the provider to the client, the transmission being made via the agent; using wireless communication means, transmission of an authorisation confirmation from the client to the provider; and release or blocking of the resource upon testing with a certificate issued by the resource owner in advance. using wireless communication means, transmission of a resource request from a client to a provider, the transmission preferably being made via an agent, using wireless communication means, transmission of an authorisation request from the provider to the resource owner, using wireless communication means, transmission of an identified authorisation request from the resource owner to the provider, using wireless communication means, transmission of the identified authorisation request from the provider to the client, preferably via the agent, generation of a local receipt by the client and, using wireless communication means, transmission of this receipt from the client to the provider, preferably via the agent, transmission of the receipt from the provider to the resource owner, validation of the receipt by the resource owner, and transmission of an authorisation response from the resource owner back to the provider, and release or blocking of the resource by the provider to the client, wherein the method comprises the following steps in case the connection between the provider and the resource owner is temporarily interrupted: using wireless communication means, transmission of a resource request from a client to a provider, the transmission being made via an agent; using wireless communication means, transmission of an authorisation request from the provider to the client, the transmission being made via the agent; using wireless communication means, transmission of an authorisation confirmation from the client to the provider; and release or blocking of the resource upon testing with a certificate issued by the resource owner in advance. using wireless communication means, transmission of a resource request from a client to a provider, the transmission being made via an agent; using wireless communication means, transmission of an authorisation request from the provider to the client, the transmission being made via the agent; using wireless communication means, transmission of an authorisation confirmation from the client to the provider; and release or blocking of the resource upon testing with a certificate issued by the resource owner in advance.