An ITIN is an Individual Taxpayer Identification Number. It’s a nine digit number used for paying taxes and just recently for other things such as for applying for mortgages, loans, credit cards and other things. These numbers are issued to people who don’t have or can’t have a Social Security Number.
This site will show you how to get an ITIN (completely free), what you can do with an ITIN (there are more possibilities than you think), and show you other resources to help you.
Technically an ITIN is only suppose to be used for paying taxes, but in reality that’s not the only thing you can do with it.