Please review information at the International Parental Child Abduction Contacts (state.gov). They can be reached:

By Phone

1-888-407-4747 (from the U.S. and Canada)
+ 1 202-501-4444 (from outside the United States)

By Email

Questions regarding preventing international parental child abductions:
PreventAbduction1@state.gov

For general abduction questions:
AbductionQuestions@state.gov

By Mail

United States Department of State
CA/OCS/CI
2201 C. St., NW
SA-17; 9th Floor
Washington, DC 20522-1709