I recently , on a Saturday afternoon, had a white van pull up outside our rarely used back entrance. An individual wearing a quasi-uniform approached saying that I had a problem with my visa. I laughed in his face, saying I renewed my extension of stay (11th year) last week. He showed me a printout of an obviously older Sino-Thai gentleman asking if this was me. I told him it obviously was not. He asked to see my passport, I showed him, but did not release custody of it. He apologized and left. A very strange encounter. My local Immigration office have never carried out a home visit in those 11 years.