In this age of multimillion-dollar CRM programs and equally expensive targeted prospect and customer contact strategies, the perils of missing or incorrect contact data can be costly. Compiled lists and response lists are the traditional "go-to" sources, but more marketers, who demand higher accuracy and sell-through, are seeking "hard-to-find" data sources - particularly as regulation and suppression erode the completeness and availability of existing data sources. There is too much opportunity lost, and waste being generated, by neglecting the integrity and completeness of contact data.