This tactic involves police agencies sending letters or other forms of messages to the homes of known or suspected sex buyers. These “Dear John” messages, used in close to 100 U.S. cities and counties, are sometimes sent to the addresses of registered car owners, alerting the owner that their vehicle was seen in an area known for prostitution and suspected of being used for that purpose. For example, in September, 2019, the San Jose Police Department launched the “Report John Program” designed to reduce human trafficking and prostitution by reducing consumer-level demand. Community members are invited to participate by reporting “Johns” they suspect of soliciting providers of commercial sex or trafficking victims.  Reporting is facilitated by a simple website form used on phone, tablets, or desktop computers that crowdsource feedback from the community. Residents can upload a photo and provide vehicle and other identifying information on a potential sex buyer. The Department’s Human Trafficking Unit then evaluates the information and determines if further investigation is warranted. If appropriate, a Public Safety Announcement (PSA) letter is sent to the registered owner’s address, alerting the registered owner that his or her vehicle was seen in an area known for high levels of prostitution. This letter also serves to educate the registered owner about the dangers of prostitution and related illicit activities.

Letters also can be sent to the home address of the men arrested in reverse stings. Some jurisdictions have employed electronic messages used in the same way: e.g., in 2014, Santa Rosa (CA) detectives began tracing phone calls and texts responding to their decoy online ad for a web-based reverse sting, and sending “Dear John” letters or messages to identified accounts and addresses. In 2018, the Brown County (WI) Sheriff’s Office used a similar electronic variation of the “Dear John” letter: during a week-long web-based reverse sting, over 400 people who made contact with police online (but did not incriminate themselves enough to warrant charges) were sent written warning messages by police. Often, these letter or electronic messages include warnings about health risks and the harm of commercial sex to communities and survivors.  At least 98 U.S. cities and counties have used these kinds of notifications to help deter sex buyers and to warn others at their homes of potential risks.

To learn more about this intervention and how it has been implemented, please see our Tactic Summary  document (March, 2023) as well as the links to resources provided below. You may also locate where in the United States that this tactic has been used by visiting Demand Forum’s mapping or listing functions, and selecting from the list of tactics. By clicking on each of the cities and counties listed or mapped, you may access brief summaries of the implementation of each tactic in that community, and links to source documentation. Please note that some of the examples below of “Dear John” letters and templates are available in English and in Spanish.

Sample Letters from Police Departments

News Reports and Press Releases About “Dear John” Letters

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