While a State of Wisconsin private detective license is not required to perform process service, DIVERSIFIED investigations, llc trains all of its licensed private detectives to skip trace people to find current addresses whenever their location is uncertain or unknown. This is done in an effort to avoid additional service attempts that would increase the overall fee to our clients. After proper service is made, our investigator will complete the necessary affidavit of service, get it notarized by one of our in-house notary publics, and return documents to you promptly.