If you lose your passport, a replacement can be issued upon presentation of proof of identity and US citizenship. If you believe your passport has been stolen, first report the theft to the local police and obtain a police report. You will have to pay 60 USD for your new passport. When a child is born overseas to an American citizen parent, or parents, certain documentation is required in order for the child to be registered as an American citizen. The ACS office encourages all American citizens residing in Vietnam or staying in Vietnam for more than a few months to register with the Consular section.
Registration form is attached.
Registration is not required, but is strongly recommended. For replacement SSN cards, a US passport is generally sufficient for re-application. The Consular Section can provide voting information on all 50 states. Federal postcard ballots applications are also available. Document of other citizens that are to be used in the United States may also be notarized.