+1(514) 937-9445 or Toll-free (Canada & US) +1 (888) 947-9445
smileyou1234 said:
can I use my P.O. Box as my mailing address?

I used a PO box for my mailing address with no issues.
 
smileyou1234 said:
can I use my P.O. Box as my mailing address?

Don't see any issues with that since CIC would preferably contact you through your email until and unless you clearly ask them to use location address.