Like Phil says, there are plenty of places that will let you show up and start working immediately, off the books. One of those places is the United States, pa

Like Phil says, there are plenty of places that will let you show up and start working immediately, off the books. One of those places is the United States, particularly in California. If you're talking about legal immigration for purposes of work, however, I can't name a single place that would let you just show up and start working. The places with the easiest application process would likely be countries looking for English teachers from abroad (Japan, Korea, China), or places looking for cheap labor (formerly Dubai, Saudi Arabia, etc. getting Filipino, Pakistani and Indian laborers, or Cayman Islands seeking Jamaican workers).