In Myanmar, using foreign currencies (particularly your American dollars) is frowned upon by the locals. At worst, they will not accept your banknotes for a number of reasons.
For one, exchanging currencies in the past entailed heading into the local black market to get your hands on the local Kyats. This was because banks and ATMs weren’t as ubiquitous as they are today.
Keeping Your Foreign Currencies Tidy and Clean
Due to this particularly seedy history, many of the locals today still distrust foreign currencies. But more specifically, the locals are very particular about the quality of the dollars that they may receive. Crimps, stains, and minor damages on a note will certainly get rejected immediately.
In this case, it’s best to bring banknotes that are clean, crisp, and undamaged when you visit the country. Do be warned though, you may still be turned away (especially at international airports) if any of your U.S. monies aren’t up to par with the country’s notoriously high standards.
However, you should not get rid of these crumbled and old bills just yet for many accommodations DO accept these dollars without much problem. Along with that, plenty of local businesses are accepting of the U.S. dollar from tourists as an alternative to the local currency. You just have to find the right place.