Does my friend need proof of return flight to enter Thailand as a tourist?

It's extremely rare to be asked for proof of a return flight when entering Thailand unless they have an extensive history of back to back TVs or visa exempt stamps

Now on a similar not, what about my situation where I am in LOS currently on visa exempt, and have a return tickets from bangkok to hingkong? Do I now need proof of ongoing travel before they let me board my return leg from HK?

Well it depends where from also. It happened twice with me at Heathrow and I spoke to them and they said if any airline lets anyone leave heathrow without ongoing ticket and the airline get caught they get fined £2000, thats on top of returning the passenger.

I've just blocked an idiot name caller before I respond and probably get banned.

You haven't been asked yet. How many out of 35 million tourists are members on a visa forum. You, me or the bloke living below me has no idea how many rejections or refusals there are at immigration for a whole host of reasons.

No Need I usually book one way and have never been asked yet. Ron Angel This one has 20,958 members And as I said from personal experience I have never been asked about a return ticket. I travel on an Aussie Passport so I get 30 days in which to notify my departure date. I leave on or before the 30 days is up. Its possible other countries passport holders would need to show departure documents but as the questioner didn't specify where their friend is coming from , your negative remarks are retarded at best.

No such thing as a quick question, it seems. Thai immigration is endlessly convoluted with rules and exceptions.

What passport is your friend coming on? Will they have a visa, or a visa exempt entry? Coming by land or by air?

The airline company is responsible for it. So probably this person will be required for the proof in the departure airport. In inmigration here in Thailand will ask for an acommidation adress during the staying, nothing more.