help with applecare

hi,
about a year ago i bought my mbp and purchased applecare with it. i still have the receipt and serial number but I lost the applecare package with the enrollment number on it. When I check the apple support site it says my product is registered and covered under applecare. Do I need to worry about finding the applecare number or is the serial number and receipt all i need since it's already activated and registered?

Thanks!