Abstract: A method, smart card and electronic device which disable transmission of a credential stored on the smart card are described. In one aspect, the method includes: detecting occurrence of a predetermined trigger condition associated with a power state transition affecting the smart card storing the credential; and in response to detecting occurrence of the predetermined trigger condition, adjusting a registry to de-activate an applet associated with the credential, the registry controlling wireless transmission of the credential such that when the applet associated with the credential is de-activated, wireless transmission of that credential is prevented and when the applet associated with the credential is activated, wireless transmission of that credential is permitted.