US Customs and Border Protection is seeking to hire private investigators to track down deported immigrants and others who have left the United States, and press them into paying the government money, according to records reviewed by WIRED. The work would cover Mexico, Honduras, and Guatemala, and potentially other countries. The documents, which cap the so-called Tracing and Payment Recovery Services program at $9 million over the next two years, call for "commercial data verification and physical observation services" to confirm where each person lives. As of July, the Department of Homeland Security, CBP's parent agency, says it has issued more than $84 billion in fines to immigrants it has accused of failing to depart the United States. Those fines run against people who are still in the country, at $998 a day for up to five years. Some have reached up to $1.8 million. Hasan Shafiqullah, the Legal Aid Society's immigration supervising attorney, says he's seen some third-party collection agencies add $500,000 in additional administrative fees on top of the US government's fees. Immigrants accused of failing to depart have had their tax returns seized, their wages garnished, and their credit scores ruined. DHS promises that it will forgive failure-to-depart fines if people self-deport using the CBP Home app. The waiver does not include a separate $5,130 fee Congress created last year for people ordered removed in absentia and later arrested by ICE.