Dear Friends,

I am manager for a Thai ownership company, i have a guest coming from Iran for a business meeting

guest requested to provide a business invitation letter for business visa

Is there any format to write a business invitation letter?

is there is legal problems if the guest stay Thailand after the business meeting?

There is no legal format, but normally you must clearly identify the person you invite and the company he works for. That means his name and date of birth and passport number and the name and address of the company and explain the reason for his visit (doing business with your company).

No, there is no problem for you if he stays longer. (But of course they might take it into considaration if you write a new invitation).

Dear Sir,

Is i need send this business letter to Iran embassy by fax or email?

or just send to the guest by email?

Dear Sir,

Is i need send this business letter to Iran embassy by fax or email?

or just send to the guest by email?

The letter will form part of the guests application for a visa .

As the letter is a personal invitation it would best be sent to the guest .................

You should send it to the guest, but I would do so by regular mail. An email might not be enough.