Interesting as I’m on a
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roster so that equates to 17 entries a year…. I have been living in Thai on a visa exempt status for over 30 years…I do have Thai kids and am on the birth certificate.. my youngest is 32 years old . During these decades I have been asked exactly 2x why I come so often. The last time was about 3 years before Covid and it involved a short conversation with a higher ranking immigration officer who was summoned but the “booth guy” the conversation was friendly and started with asking if I can speak Thai . The whole conversation from that point on was in Thai…. 3 questions in was do I have kids in Thai and I answered yes… no documents or proof was required but from that point the whole conversation changed to positive…. He asked why no visa and said nothing fits, he understood and shook his head… he nodded at the booth guy and gave him my passport and since that time I’ve even had smiles and quite often a welcome back comment….. in short I wouldn’t worry about a visa and if asked just be 100% honest about work kids etc and should be fine …. A side note too if you are on a Thai borne birth certificate you can open bank accounts etc without the usual rubbish that many go thru (kbank rules)