CIC requires 2 self-addressed mailing labels included in the application. Can you tell me which type of mail I should send along with the application? Should I send priority, express, or regular mail? Specifically, I am living in the US, so can anyone also living in the US suggest me which type? FedEx express, priority, UPS... ? By the way, which type of mail you send your application? Of course, express one is the best but it costs the most. But is it really necessary? Thanks.