As a person living in the United States on a green card, you probably had a variety of moments when you wanted to host someone from your own country in your home. It may have been a parent, or it may have been a friend that wanted to visit you. Regardless, you need to ensure that your guest has the visa necessary to legally stay there.

That being said, while the visa invitation letter is only a small part of their visa application, it is still quite an important part. Without it, there is no chance that your visitor will get their B2 travel visa – as they will require a place to reside in.