halifac what is a roll number
Report Abuse. roll numbers releate to building societies. something like the halifax that was a building society still uses them. it is just another way of identifying your account to them, so if you have an account number, that will be enough so dont worry about it.t should be on your statement. A roll number is used by banks that bank with other banks. For example the Halifax holds it's account in Nat West (I think).