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 provider and a resource owner: using wireless communication means, transmission of a resource request from a client to the 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 the authorisation request from the client to the resource owner, using wireless communication means, transmission of a receipt comprising an authorisation response from the resource owner to the client, using wireless communication means, transmission of the receipt from the client to the provider, release or blocking of the resource in accordance with the authorisation response comprised in the receipt and wherein the method comprises the following steps in case the connection between the client 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 a receipt comprising a certificate issued by the resource owner in advance from the client to the provider, release or blocking of the resource in accordance with the receipt comprising the certificate. using wireless communication means, transmission of a resource request from a client to the 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 the authorisation request from the client to the resource owner, using wireless communication means, transmission of a receipt comprising an authorisation response from the resource owner to the client, using wireless communication means, transmission of the receipt from the client to the provider, release or blocking of the resource in accordance with the authorisation response comprised in the receipt and wherein the method comprises the following steps in case the connection between the client 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 a receipt comprising a certificate issued by the resource owner in advance from the client to the provider, release or blocking of the resource in accordance with the receipt comprising the certificate. 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 a receipt comprising a certificate issued by the resource owner in advance from the client to the provider, release or blocking of the resource in accordance with the receipt comprising the certificate.