[chaz]

To be ever so slightly more fair to Citibank, this is the page after you've already said you have a relationship with them. This is where you choose: http://www.online.citibank.co.in/customerservice/DND.htm. The other option asks for your email and phone number. Still, poorly designed and surprised it's considered to be in compliance. Phone and email inputs should be enough.

[manas2004]

The unsubscribe link in the marketing email took me to this page directly. The marketing email was targeted to existing customers.

[chaz]

Even worse, then, that this page was shown when they already know who you are.