We had not received our Annual Passes by the time we were headed to WDW for our Planning Session earlier in the month. I mentioned this to my Coordinator and he took care of everything. When we got to the park, we just went to a customer service booth and they signed us up.
The cool part is everytime we would come into a park, it would say something about having a Wedding Annual Pass and Cast Members would congratulate us (that never gets old!)