YourThaiPlanet.com

Although Singapore is not a bordering country. It is a popular place for people to go for a new nonimmigrant or tourist visa from the Thai embassy there, especially for people who have already been to all the other bordering countries, or who prefer a place where everyone speaks English, or another modern place not far from Thailand time-wise. People from most countries don't need a visa to go to Singapore.

If you go to Singapore for a visa run, you should be advised that many, many people have been denied a tourist visa at the Thai embassy there on the basis that they just left on a tourist visa and must wait 30 days before re-entering Thailand on another tourist visa. Other strictness has been reported as well. Singapore is generally a non-corrupt and strict country, and this culture seems to spill over into the Thai embassy there.