A method for managing requests from Law Enforcement Agencies (30, 31), LEAs, for interception or retention of data relating to a target user, characterized in that two different LEA users (30, 31) are provided, said LEA users comprising a LEA supervisor being enabled to insert, modify, view and delete electronic warrants, and a LEA investigator being enabled to set a target user, the method comprising the following steps being carried out by a data retention system or by a lawful interception management system adapted to communicate with said LEA supervisor and said LEA investigator: - detecting (36, 40, 63, 74) a request of interception or retention on the target user from the LEA investigator; - verifying (37, 42, 54, 75) whether an electronic warrant is activated with regard to said target user, the electronic warrant being activated if said data retention system or said lawful interception management system receives the electronic warrant from the LEA supervisor, stores said electronic warrant and acknowledges the setting of said electronic warrant to said LEA Supervisor; - and in case an electronic warrant is not activated on the target user: - issuing a notification to the LEA supervisor; - provisionally granting said request; - checking whether an electronic warrant has been entered by the LEA supervisor in respect of the target user after said notification; - granting (38, 55, 65, 76) said request in case the electronic warrant has been entered by the LEA supervisor in respect of the target user; - denying (39, 56, 66, 77) said request in case an electronic warrant has not been entered by the LEA supervisor in respect of the target user. - detecting (36, 40, 63, 74) a request of interception or retention on the target user from the LEA investigator; - verifying (37, 42, 54, 75) whether an electronic warrant is activated with regard to said target user, the electronic warrant being activated if said data retention system or said lawful interception management system receives the electronic warrant from the LEA supervisor, stores said electronic warrant and acknowledges the setting of said electronic warrant to said LEA Supervisor; - and in case an electronic warrant is not activated on the target user: - issuing a notification to the LEA supervisor; - provisionally granting said request; - checking whether an electronic warrant has been entered by the LEA supervisor in respect of the target user after said notification; - granting (38, 55, 65, 76) said request in case the electronic warrant has been entered by the LEA supervisor in respect of the target user; - denying (39, 56, 66, 77) said request in case an electronic warrant has not been entered by the LEA supervisor in respect of the target user. - issuing a notification to the LEA supervisor; - provisionally granting said request; - checking whether an electronic warrant has been entered by the LEA supervisor in respect of the target user after said notification; - granting (38, 55, 65, 76) said request in case the electronic warrant has been entered by the LEA supervisor in respect of the target user; - denying (39, 56, 66, 77) said request in case an electronic warrant has not been entered by the LEA supervisor in respect of the target user.