What is Full reference line?

Avast Account (my.avast.com)
1

I got this email

Please also include the following information if it is not shown on the proof in order to effectively locate the charges:

  • Your full name and address
  • The account holders name if different
  • Date of charge
  • Charge amount + currency
  • Full reference line
  • If Credit Card: First 6 and last 4 digits of number + card provider
  • If PayPal: Invoice ID

I do’nt know what is “Full reference line”.
What is “Full reference line”?

2

If you’ve any questions, reply to the mail and ask.

3

Customer not replay my email.
So I started ask in this board.

Can you inform me some customer email address?
It is possible, I sended mail to some wrong address.

4

Please stick with your original topic https://forum.avast.com/index.php?topic=235169.0 or it will cause confusion and duplication of responses.