Abstract: The invention specifies a method, an apparatus and a computer program product for automatically verifying messenger contact data. In this context, a computer unit (2) receives input messenger data from a user via a data link (5) and automatically, as a subscriber in an instant messaging system (6) associated with the messenger contact data, uses the received messenger contact data to send to the user a message containing a piece of confirmation information. For verification purposes, a user input is registered in line with the confirmation information, and the messenger contact data are then verified.

Abstract: An efficient, flexible, fail-safe and customer-friendly method is specified for customer-specific creation of entries in a compilation, such as a telephone book or the like, as well as an associated device. At least one customer data record is transmitted from a central core database to a mobile presentation system for a number of preconfigured entry prototypes to be produced on the basis of stored entry templates taking into account the customer data record, and to be displayed on the presentation system for selection. The presentation system generates a corresponding order in order to produce the entry in the telephone book or the like on selection of an entry prototype.