Different advance notice strategies for telephone surveys will be discussed. The main theoretical reasoning is that an advance contact underscores the legitimacy of a survey, takes away suspicion, communicates the value of the survey, and evokes the principles of social exchange, thereby positively influencing response. In the first part of the talk a meta-analysis of advance letter for telephone surveys will be presented. In the second part of the talk results of a nationwide caller-id experiment will be discussed. Both advance letters and caller-ID (a compact form of advance letters) improve cooperation and response rate, but not in all cases.