Assume a 60 day Tourist Visa and I stay 20 days in a Bangkok hotel, 10 days in private Bangkok residence (say no TM30 req'd in BKK) then 20 days in Pattaya (50 days) and then apply for 30 day extension in Jomtien. Surely Jomtien Immigration will fine me for the TM30 gap in my national file by saying I probably was in Pattaya for those earlier 10 days??? (I cannot prove them wrong if Bangkok Immigration say dont bother us ie no evidence).
TLDR : Answer Summary
The issue at hand involves potential fines related to the TM30 reporting requirements while extending a 60-day Tourist Visa in Thailand. The original poster has stayed in Bangkok's hotel and private residence and is concerned about a gap in TM30 reporting due to time spent in Pattaya before their extension application in Jomtien. Comments indicate that while TM30 is mandated within 24 hours of staying at a private residence, enforcement varies across immigration offices. Many users suggest that potential penalties are not consistently enforced and emphasize the importance of proper reporting, although firsthand experiences indicate varying levels of compliance and scrutiny by different immigration offices.