Visa Invitation Letter HELP! (Istanbul)

Hi All,

I need a template for Visa Invitation Letter, there are many examples online but I can not quite understand what kind of descriptions I need to supply for it to be more efficient. (I have the company name, full names of the employees invited and their titles... do I need anything else)

Ill be very glad if you have a used and proved:) one and share it with me.

My email is Protected content .

Thank you...

G