You will be assigned a number when your deposit is received.  I revise the master list for each type of litter after the selection process is complete.  Each person remaining on the master list will receive an email with the updated list so you are aware of what your number will be for the next upcoming litter.  Because everyone has the option to pick or pass on any litter, you may have the opportunity to choose a puppy sooner than later.  You never know when you will get that special call, so be prepared!