As a lot of othes have commented if you have enough income and savings to sponsor her then make the application on line and upload proof of your income and savings as her sponsor. There is no actual requirement for her to have THB 500,000 in her account. But the more ties she has in Thailand such as property or family or job would help the application so include anything relevant. The visa application is technically her application but you are allowed to complete it and submit it on her behalf it is all on line. Once you start the application you can save it and go back to it to add things as many times as you like. I would suggest if you are doing the aplication on her behalf you put your email address and be sure to make a note of the application reference number. There are different sections so be sure to include information and evidence in the right section / folder and clearly name the files (or evidence) so it is easy to link them to the subject matter. Take your time, be methodical about it and thorough and follow all the guidance on the UK Govt web site. It is important to prove your relationship so you will need to draft a Letter of Invitation or sponsorship letter. Include a history of your relationship and that you will be covering the cost of the trip and accommodation and any other needs while she is here. Start the application and see how you get on. Do not try and do the application all in one go. And carefully check it before you hit Submit. Any specific questions you have then there are likely to be people in the group that could help with. I was successful with two visit visas and a spouse visa with similar circumstances. It is not easy but if you are thorough and meet the eligibility criteria you can be successful. Good luck. Just do it and see.
It would depend on their situation and what visa would be best for them to come to the UK to live and work. All of the information is on the UK govt web site you or they should go there and look up what options there would be. It is neither easy or cheap for a Thai national to move to the UK with the right to work. A spouse or fiancé visa would include right to work or other than that the most likely option would be a tier 2 shortage occupation visa as long as they meet the criteria for that.
Be aware that you normally apply for an IDP in your country of residence before you leave. I do not think this is a genuine site and even if it provides a valid IDP which I doubt the price is inflated. In the UK you apply at the post office in person and pay £5 and you get the IDP. In Spain you would apply in Spain if you hold a Spanish licence.
OK to be clear. If she is successful in her application when she collects her passport back from VFS it will have a vinegarette sticker in it like the one someone else showed. The valid from date on that is the first date she can enter the UK. That is all she needs to enter the UK on a spouse visa. The vinegarette will say what kind of visa it is. The vinegarette sticker is valid for 3 months so she must enter the UK within that time limit. You will also get a letter which will tell you what to do in the UK. Basically once in the UK she will need to collect her Biometric Residence Permit (BRP) from a local post office. That will be valid for 30 months and will have an expiry date on it. She will use the BRP with her passport if she leaves and returns to the UK.
no problem with doing that. As long as she has the visa vignette in her passport there will be no problem for her entering the UK. But my advice is to meet her at the airport and keep your mobile on. Then if the immigration officer does have any questions they can contact you to verify. That has happened to me twice. First time my phone was on silent but the 2nd time I answered. They just wanted to confirm everything was legit and they let her through
No. I married my wife at a district office and registered the marriage there. You do not have to register your marriage again in the UK. We obtained the spouse visa for her to come to the UK using her maiden name and she did not change her name in Thailand on her passport or anything else. She entered the UK and had a brp in her maiden name. We applied for her NI number with no problem. We now 1 year later have been back to Thailand for her to change her name there and get a new passport in her married name. Now back in the UK we have changed her name on everything, we are just waiting for her UK driving licence to come back. So you don't need to do it straight away. But my advice would be if you plan on her using your married name it will be easier to change it before you apply for the spouse visa so you do it in her new name. Simply because changing everything after she comes to the UK is a pain in the backside. What you do not want is a visa in her old name and a passport in her married name. This is from our experience I do not profess to be an expert.
If you transfer money abroad direct from your bank you will get hammered with charges. I use Western Union app it's easy quick and cheap. To transfer £500 for example costs just £1.90.