verisign payment site backdoor ?

[Andrej Todosic <atodosic () ubisoft com>]

Hello, 

so i had today a little adventure with verisign about paying some domains. 
When you go on their secure site and enter payment information, they now
require a security check
The security check consists of entering a billing address postal code.
Without this the payment wouldnt work.
After verifying several times witht hem on the phoen ( their system wont
accept a canadian postal code).
They told me just to put 5 zeros. The payment went through. I also seem to
vaguely remember a mention of it somewhere in the payment confirmation
screen. My question is:

they gave it to me, so they know very well it exists, but what security do
they have if they have a backdoor like this, 
and what is the point of extra precautions when you publicly tell everyone
to use zeros if nothing else works. 

I dont know if this should be made into a big thing, but i certainly dont
feel comfortable with these guys having my CC number.


Comments or opinions are welcome. 

Andrej