1. A method of operating a call center, the method comprising: maintaining in electronic storage personal profiles of a number of clients of a service provided by the call center, wherein at least one of the personal profiles includes identification of one or more entities authorized by the respective client to act on behalf of the respective client, wherein a particular one of the one or more entities is assigned one or more trust level indicators specific respectively to one or more particular categories of action; receiving from an inquiring party via an electronic network an inquiry whether the particular one of the one or more entities is authorized by a particular one of the number of clients to perform a proposed action on behalf of the particular client, the proposed action relating to one of the one or more categories of action; and determining, based on at least one of the trust level indicators and the category to which the proposed action relates, whether the particular one of the one or more entities is authorized by the particular client to perform the proposed action.