[Solved] Cambridge University St Edmund's college Circuit laundry card invalid card number

You might want to register/top up your Circuit laundry card but it always gives you an error saying that your card number is invalid.

Here are potential fixes:

1. Add a "0" to the head of your 8-digit number
My card number has the format of : LXXXX ESD YYYYYYYY X/XX
So my card number should be 0YYYYYYYY

2. Make sure you choose the right laundry room site
a. You can figure out the site by visiting the laundry room and find out the "site number" on the wall, and then call 01422820026 to ask which site it is
b. For St. Edmund's College there are two sites :
      b1. Cambridge -> St. Edmund's College -> Mount Pleasant Halls
      b2. Cambridge -> Cambridge University -> St. Edmund's College
   If you use the one in the old buildings please choose b2.