Monitor the activity in your Vanguard account, and alert us immediately of any activity you didn't authorise.

Review the account-related information we send or make available to you as soon as you receive it, including account statements, confirmations, changes to your mail preferences (such as an address change), bank information (such as the addition or deletion of a bank), and other services.
Let us know immediately if you discover unauthorised activity, whether that activity is a transaction, a change to your account, or the addition, removal, or change of an account option or service. If you see something that you don't understand or that looks unusual, contact us for an explanation.