To manage and activate your prepaid Visa or MasterCard gift card, go to www.Myprepaidcenter.com. If your card requires activation, this will be indicated on the back of the card or its packaging. On the website, select ‘I Have a Card’ and enter the necessary card details to activate it. For virtual cards, click on ‘I Have a Code’ and input the code received via email. Registering your card with your name and address on the site is also recommended, as it provides additional security and facilitates easier replacement if the card is lost or stolen. This ensures your card can be used both in stores and online seamlessly.