I am thinking of going to Vietnam for a few months and maybe more...
The plan is to cross the land border at Ha Tien with my family and 6-month baby from Cambodia to Vietnam, then head to Saigon. I have done visa runs at this crossing for my baby about half a year ago and they didn't ask for proof of onward travel. That time the officer just stamped our entry/exit stamps and told to move along back to Cambodia.
Do I need proof of onward travel when crossing on land from Cambodia to Vietnam at Ha Tien?