Is it necessary to stay overnight in Cambodia when doing a border bounce from Thailand?

It's an online application. First you register on the UK government website then submit the documents again online via VFS Global. Start the process to see exactly what is needed and note carefully every requirement to ensure that your uploads address every requirement (and include references in your application). It's doable.

I did the poipet border crossing as my first ever border bounce. The train was about 5 hours, then walk about an hour. Stayed for 2 weeks in Cambodia and still had issues coming back across that crossing. They let me through but i havent used it since. To better understand, it is not thai immigration that is the issue it it Cambodian immagratiom agents that deny you. Also if you are going alone as a female I would not reccomend this trip. Everywhere in Thailand is fine but you dont want to be alone stuck without a plan in poipet.

So is it safe to say if I’m in Bangkok on a 60 day Visa exempt and during that time I fly from DMK to siam reap  to visit Angkor wat and returned to Thailand through DMK. There will be no issues and a renewed 60? and then also taking a trip to Hanoi and returning all within the original 60 ??

Try this agent

Thai Visa

Hua Hin to Myanmar & back same day

4500 Baht

Incl lunch etc

Just stay on a retirement visa ..

No obligation to stay overnight for a border bounce to Cambodia. Use Chong Chom or Chong Sangam, both user friendly crossings

Not required, only some borders in Laos require it.

I live permanently in Thailand now, but only a few years ago pre covid I flew Air Asia from Hua Hin direct to KL and returned back the same day on the same plane, no problems, but the flight has never been available since Covid.

Fly to KL few days or to Ranong

You've decided on the absolute worst plan possible. Poipet is known as the worst land border in Thailand. You're almost guaranteed to receive a "denied entry" stamp in your passport if you try your plan. That border loves denying entry to people trying to do border bounces. It's such a bad border that border bounce agencies won't even use it.

If you want to do a stress free border bounce then contact an agency that offers that service. They'll guarantee you get out and back in, and they won't use the Poipet border.

If you want to try to do it on your own, choose a different border. But be prepared if you're denied entry trying to get back into Thailand. Your only option if that happens if traveling to Phnom Penh and trying to fly back, but the airports are generally more strict than the land borders.