Welcome, Amzi! I'm so happy you stopped by planDisney with your question and it's always a pleasure to help our fellow Guests.
Personalized embroidery is such a wonderful way to commemorate a visit to Disneyland Resort! I checked with a Cast Member about your question and they advised that as long as the Guest keeps the original receipt showing that it was purchased at Disneyland Resort and the item is completely unused with all tags attached, they can typically request embroidery services up to a week after purchase. Unfortunately, I'm not sure if bringing it back a month later would meet this requirement.
Amzi, did you know that you can find custom embroidery outside the Disneyland Resort theme parks, too? I've had some items embroidered at
World of Disney in the Downtown Disney District and inside
Disneyland Hotel's small world Gifts and Sundries, which are both nice options if you don't happen to have a park reservation.
I hope this helps, Amzi. More than anything, I wish you a fabulous next visit to 'The Happiest Place on Earth!' If you have any other questions that come up in the meantime, please feel welcome to come back to
planDisney anytime. We'd love to see you again real soon!
Magically yours,
Tishra