There was previously no seasoning of funds required for this extension so if there now is then that must have changed? 🤔

Has this recently changed as previously there was no seasoning of funds required for Thai dependant visa. Perhaps Tod Daniels knows?

And print it and staple in your passport as you can't do anything with immigration (Phuket) without it

Failing that you'd just get a 30 day visa exempt stamp on your return as your visa would be finished when you left to go to Srilanka

Just get a re-entry permit before you leave Steph, that will keep your admitted until date valid for 90 days from 3rd Feb. Re-entry permit is 1500 baht

In the event of being stopped and then you explaining your situation you may actually be shooting yourself in the foot as you will be explaining that your not actually a tourist and admitting to having the incorrect visa. You're best off with the correct visa especially with family involved. You can get 1 guardian visa for each child

In the past there's always been a really pleasant helpful lady at the drive through, not today though

With what you have ie birth cert you can get a single entry 90 day visa. You can then extend that for 2 months inside Thailand to get a maximum of 5 months. If you want longer you have to go through a court process to legitimise paternity. If you do that you can extend for a year provided you meet the financial requirements. You can then also extend annually thereafter

400k correct for a Thai misses

It's valid until the visa expiry date, then you can't get another one unless of course you remarry