We have a customer who is a Non US Person. He has two loans with our bank and recently opened a savings account with his wife, who was not born in the US but states that she is a legal permanent resident and is in receipt of a SSN card. Her husband (the Non US Person) has given his tax number as 819-XX-XXXX and this is also the tax ID number on Chex Systems and on his credit report. My research tells me that tax numbers for Non US Persons must begin with the number 9. Is this correct and how can I verify this?