Occasionally, AOL may contact you via email to request you to update your billing information. However, online con-men may try to unscrupulously obtain your password/billing information by these means.
Online scams are simple to avoid. Just remember: Email from AOL will only ever ask you to update your billing information by signing-on to AOL and going to AOL Keyword: Billing or calling AOL Member Services on 0870 3 20 20 20.
If you're in any doubt, don't give out your information - forward the mail to CosUK and call AOL Member Services on 0870 3 20 20 20 - they'll be able to tell you if the email is genuine & can update your payment information over the phone.