IF you apply for a VISA outside Thailand (On line or Embassy) you can be asked to show money on ANY bank account.

IF you apply for a VISA inside Thailand or an Extension of Temporary Stay at an Immigration Office you can be asked to show money on a Thai Bank account on your name.

The difference is where you apply and who's requirements you need to follow, that is why correct terminoligy is important to give advice.

You need to talk with your employer and see IF they are able to convert your Visa Exempt Entry into a Non Immigrant B visa at Immigration or if you have to apply at a Thai Embassy.

Your friend need also to apply for a Non Immigrant B visa, or Smart Visa or the LTR visa as the ED visa is employment prohibited, which simply means not allowed to work while being inside Thailand.

The only way to get an Extension of Stay based on medical reasons is with a doctor statement and hospital support.

So get him to a hospital and shout out before entry he has Covid, it seems amazing but hospitals, nurses and doctors know how to handle and how to put the patient in an safe area.

@Steve ******

Only if you have resident status in Vietnam, otherwise you can not apply there for the Multiple Entry Tourist Visa.

AND the stamps in your passport and boarding passes do show you are not coming from home country, so fooling the system with fake VPN and fake tickets is not the best thing to do.

No restrictions, you are allowed to enter Thailand multiple times in your life.

Just looked at the Immigration website to confirm myself.

To convert to the Non Immigrant O visa might be a problem as Tod described, but for the 1 year Extension of Stay the rules are clearly written:

@Piers **********

IF you enter using a valid Non Immigrant visa you get a new stamp with a new term of 90 days of stay.

IF you ask about the 90 day reports for people with long term stay, it is not valid IF you use this visa as you are not allowed to stay longer than 90 days.

Did you buy a Single Entry Non Immigrant O visa, that the answer is NO as in Single it means you can only use it once

OR

Did you buy a Multiple Entry Non Immigrant O visa, than you can enter as many times as you like and get 90 days AS LONG AS you enter before the valid until/enter before date mentioned on the visa.

Later this year and you want to stay 7 weeks on a 30 day stamp?

More than time enough to apply for a Single Entry Tourist Visa and get 60 days on entry without hassle with airline companies or buying fake tickets to show.

You're lucky, same benefits, 30 days on arrival and possible to extend once with another 30 days at local Immigration office