Hello Regina,
What a thoughtful gesture! It sounds like your cousin is indeed fortunate to have such caring family members. Celebrating with a gift like that is truly special.
In terms of canceling the
Magic Key pass you purchased, since your cousin already has one from her aunt, it would be best to contact Disneyland Guest Services directly to discuss your options. They can provide the most accurate and personalized advice for your specific situation. You can reach them at (714) 781-4636. The Cast Members there are wonderfully understanding and will guide you through the process of resolving this duplicate gift.
Since you're already thinking ahead to future visits, a useful tip for next time could be considering
Disney gift cards as an alternative. Disney gift cards can be a versatile present, allowing the recipient to use them for a variety of experiences, merchandise, or even towards their next annual pass. They offer flexibility and the joy of choosing exactly how to enjoy the magic of Disney.
Remember, we're here at planDisney to help with any more questions or to offer advice for future Disney planning. It's all about making each Disney experience as magical as possible.
Regina, I hope this helps, and that your cousin enjoys her time as a Magic Key holder. If there's anything else you need or more questions you have, feel free to reach out. Wishing you and your cousin many delightful Disney adventures ahead!
~Yael