No limit on referral credits per person. Only one credit per referred person. Referral offer cannot be combined with group rates. Credit will be applied within 15 days of when the final payment is received from the referred party. Credits expire one year from the date of last purchase. To extend credit validity simply keep the account active with a purchase. Referral fees cannot be applied to previous orders or purchases. The referred party must not be a current client. Referral credits must be used in the full amount that was issued in blocks no partial credits will be given. Referrals within a household as in same address on government-issued identification will be eligible for a $10 credit.