Not suspect at all. But do not send your passport go to the customs. When we arrived in Bangkok, we had to give my husband's passport for the clearance of our container. We live in Bangkok, so the movers came to get the passport themselves and brought it back to us a few days later. However, since we were in another city, we had to take it to customs ourselves...
Last question 😁 if I leave the country during 1 month and I come back with a tourist visa. Can I then get a guardian visa without leaving the country? My daughter is also studying in Thailand with an ED visa and I could be her guardian. Besides, my son is under 14 years old and I was told on another forum that he doesn't need a visa. Is this true? That's two questions 😜