Hello, Adrian, and welcome to planDisney!
As I'm sure you're aware, at this time only California residents may visit
Disneyland Resort. Disneyland.com states, "Proof of residency may be required." I would suggest both of you bringing your state IDs to Disneyland. The Cast Members at the park entrance should be able to compare your girlfriend's actual last name to the one that is on her ticket. For peace of mind, you may also want to contact Disneyland Resort and speak with a Cast Member. You can call (714) 781-4636 to speak to someone about your ticket question.
Since you have purchased
theme park tickets, make sure you have also made
theme park reservations. To enter a theme park, both a park reservation and valid admission ticket, for the same park on the same date, is required for all Guests ages 3 and up. Guests can view the
Theme Park Reservation Availability calendar online to see what days are currently open.
Before you travel to Disneyland, I would also recommend reviewing all of the information online for the
phased reopening of Disneyland Resort. Disneyland.com has important details for Guests, such as the top things you need to be aware of as you prepare for your visit. And, if you have not already done so, be sure to download the official
Disneyland app to make the most of the magic!
Adrian, please visit planDisney again if we can help you with any other questions before your visit to Disneyland Resort next month.
Have a magical day!
Bob