Hi Petra,
I personally prefer to purchase my park tickets direct from Disney as I know that there will not be any issues whatsoever and there is no element of risk attached.
Magic Your Way tickets are available to purchase from the
Ticket Store on the Walt Disney World website prior to your trip.
When purchasing tickets from the Walt Disney World website, you have two options. Firstly, you can pay $5.00 for standard US domestic delivery and your tickets will be shipped to you via the United States Postal Service. If you opt for this method, you should receive your tickets within 14 days from the date that your order is placed online. You can also select US express delivery which costs $15.00 and your tickets should be received within 7 days from the date that your order is placed online. Or if you are an international traveller like me, you can select international express delivery for $25.00 in which case you tickets should be received within 12 days from the date that your order is placed online.
Secondly, you can select the Will Call delivery option and pick your tickets up from any ticket sales location at a Walt Disney World theme park on your arrival. (You must present the original credit card used during this purchase, a valid photo ID, and confirmation number at the time of pick up.) You will find that at least one ticket sales window will be open at least an hour before each of the theme parks is due to open.
Wishing you a magical trip filled with memories which will last a lifetime!