pay.php URL: 0 r = request type (enumeration) (continues [1] and one-time [0]) r=0 * s = site id (integer) s=3762 * o = order id (string 15) MUST be unique o=book3434 * sum = order sum (floating point decimal) sum=24.4388 0 d = description (string max 100) d=1 book - Two Towers fr l = language code (string 2) l=fr fr c = country code (string 2) c=be a = affiliate id (integer) a=12774 0 ot = order type (integer) ot=2 * cu = currency (string 3) cu=GBP pay.php?r=0&s=3762&o=book3434&sum=24.4388&cu=&d=1+book+-+Two+Towers&l=fr&c=be&a=3476&ot=32