Will the train company send a bill to my address when I order tickets?

I want to order some train tickets online using my debit card (UK)

On the website it said ''Please enter the billing address of the card used for the payment of this booking.''

Does this mean they're going to send a letter with a bill to my address??

Or are they simply asking it as a security

I want to order some train tickets online using my debit card (UK)

On the website it said ''Please enter the billing address of the card used for the payment of this booking.''

Does this mean they're going to send a letter with a bill to my address??

Or are they simply asking it as a security measure incase my card was stolen or something.

I really don't want a bill being sent to my address as my parents might see that i've bought tickets (on my card) without me telling them where i'm going or something

So as they ask for a billing address will they send a bill??

Other answer:

Ozbswa:
It is a security check of sorts to compare the billing address with the delivery address for the tickets; if they differ there may be further questions to answer before the tickets are released.
Christopher:
They want to check that the address you give is the one recognised by the card. You don't get a bill by post – just an email confirmation.
travelmaster:
its so they can very the [debit]card with 'billing'[your home] address
with the bank/card company they have to match
Howard L:
The address is a security measure. They deduct the money from your account as soon as you click pay. Some companies nevertheless send an invoice to your home. Most just send an email.