I am guessing it will be the day CC is charged!! I have to do mine yet!I can only guess - The date printed on the FBI letter is what one should go by. The disclaimer is that I am still waiting on mine to reach me so not sure if they even put a date on it, but it makes sense to have it on there.
Can you let me know if I have moved permanently from US, Is PCC valid for 6 months or lifetime? As some were saying the latter!