and yes, a workaround - OPTION 1: i've cheekily used IN PP and CA PP nos. in 2 different appointments. when you're there, act innocent IF AT ALL the guard asks while screening your appointment to let you enter. OPTION 2: i've also used 0 and O interchangeably. this way you need not get stuck with trying to cancel the first appointment before booking the next one.Same situation. Did you find any workaround please?