Might seem like a daft question, I have a 6 month multi entry visa, got stamped in for 60 days a few weeks ago, but have decided to head to Cambodia for ten days or so then come back, is there anything I should be doing at airport visa wise before I leave or simply show them my multi entry when I get back and get stamped in for 60 days again? Thanks
TLDR : Answer Summary
If you have a 6-month multi-entry visa and received a 60-day stamp, you can leave for Cambodia and return without any additional procedures at the airport. Upon returning, just show your multi-entry visa at immigration to receive another 60-day stamp.