Tajikistan has a cash-only economy. International banking services are limited, but ATM machines have been installed in various locations. Cash is dispensed in both U.S. and local currency. Few establishments in the country accept credit cards and none accepts travelers’ checks. Tajikistan's national currency is the Somoni, which is convertible.
The Republic of Tajikistan does not recognize dual citizenship with most countries, including the United States. An exception is with Russia, where dual citizenship is regulated by a special interstate agreement). Dual nationals who attempt to leave Tajikistan on U.S. passports without valid Tajik visas in them are likely to have problems with immigration authorities upon departing Tajikistan.
Travelers to Tajikistan are subject to frequent document inspections by local police. You are strongly encouraged to carry copies of your U.S. passport, Tajik visa, and visa registration at all times (including while traveling within Tajikistan) so that proof of identity, U.S. citizenship, and valid visa status in Tajikistan are readily available. Always check your visa and registration validity dates so that these documents can be renewed if necessary before they expire.
Travelers to Tajikistan should keep in mind that the rationing of electricity is an ongoing practice in Tajikistan - especially during the colder seasons of the year (i.e., from September to March). During the winter, it is not unusual for Dushanbe to be without electricity at night and sometimes even during the daytime. Wintertime brings even more severe limitations of electricity outside Dushanbe.
Tajikistan is an earthquake-prone country.