Security is there any time when Adobe would write and request my Social security number to verify an account?

A friend of mine had a problem with his Adobe CC account id info.  In conversation with Adobe they asked to verify his home address.  He got confused and gave them an old home address, they did verify the account anyway, but shortly after he received an email from Adobe asking him to provide his government issued id number...I believe that is UK for social security number.  Anyone know how we can confirm if this was a legitimate request from Adobe?