HSBC Debit Card, Cheque Guarantee No?

jazzy

I am making a cheque payment for an item and they are requesting a cheque guarantee number to be enclosed as well.
Please could someone inform me which is the cheque guarantee number on my hsbc debit card?
There is one large main number on the card and also a 9 digit card number at the bottom of the card, so which one to use?:mad:

thanks

grumbler

Cheque guarantee card number is just the 16-digit number of the cheque guarantee card ...

P.S. 9-digit number is in fact your bank account number that is already printed on your cheques.