What receipt number are you referring to? The tracking number assigned by the courier to your package? They don't go by that, nor do they record it.
When you get your AOR, you'll be able to follow your status through eCAS, or electronic client application status. It looks like this:
- We received your application for a citizenship certificate (proof of Canadian citizenship) on xxx xx, xxxx.
- We sent you correspondence acknowledging receipt of your application(s) on xxx, xx, xxxx.
- We started processing your application on xxx xx, xxxx.
Until then, you just need to wait for them to send you the AOR because there is no way for them to keep track of your application until they open it up, verify that it has been completed per their guidelines, assign it an application number, and send you the AOR with said number.