Sorry mandakl - I've not explained that very well.
They send you a covering letter which includes your full name and address, your individual loan account numbers PLUS a new unique Erudio Customer Reference number.
The form is three loose, A4, double-sided pages (1-2, 3-4, 5-6) not bound or folded or connected.
Only Page 1-2 has the identifying number pre-printed on front, top-right.
This Cust Ref No. is printed (very wee) in top right of page 1 of deferral forms (3 x double sided pages) - ONLY on front of Page 1-2
There are no other identity or pre-printed details printed on page 1 or page 2 (DD mandate) - no other pre-printed details on the forms that I can see.
On Page 1, Box 1: for verification purposes please provide DoB, NI number and tick box Tenant/Homeowner/Other
Page 1, Box 2: Are the name and address details in the accompanying letter correct? Yes/No tick box
If No - provide correct details.
Page 1 Box 3: If you have been at your current address less than 3 years provide details of previous address and how long lived there.
Page 1, Box 4: Provide Day, evening and mobile phone numbers and email address.
Each page has one of those small, black, scanning symbols in top right too.
It may be that when they receive the forms, they use page 1-2 (all the extra ID info) separately - hence that's the only page with the Customer Reference Number pre-printed.