Mail the check to your home bank for deposit. Registered or whatever. That won't take too long.
Then transfer the money from that bank to your Thailand bank on the internet. That's free and takes three business days in my case.
IMO, this is the best way to access the money from a foreign check.
Oh how I wish it were that easy. I spent last night on the phone trying to get my bank in the states to allow me to transfer funds from my account there, but they only allow transfers within accounts inside their banking system. They charge me a $40 wire fee to push a button and transfer my money here, rather than let me do it for free. I would like to own that button!
In my case, I have a Citibank checking account in America, and my official residence with them is now in Chiang Mai. I got the account in preparation for moving to CM using an American address and then later changed my address to CM. I don't think I could have opened the account using the CM address initially. I have my SS and pension deposited in there. I can access the account online. I don't know how many other banks do online money transfers, but there must be others.
To transfer money from Citibank to Bangkok Bank via online I send the money as an interinstitution transfer to the NY Branch of BB. These interinstitution transfers can be to any bank in the US, not only another Citibank. Citibank views this as an in-country money transfer, but the money actually ends up in my CM BB savings account in 3 business days. Citibank doesn't charge me anything, but BB charges me 500 baht (I think) for each $2000 I bring in.
I also have an option to wire transfer money to BB for $30, and that comes the same business day as an international wire, I believe what you refer to. However, you can send a lot of money for just the same $30, lowering the cost per dollar.
So, it is good to get a bank account where you can transfer money to any bank within the country online, and then just send it to the NY Branch of Bangkok Bank.
I hope someone will find this information helpful. It works like a charm for me.