I agree with Smoke This. There is no reason to pay extra money when sending out secondaries. Some schools will notify you when your application is complete with them, and for those that don't, you can always call the school and ask for a confirmation. I called schools, and for the most part, the people I spoke to were very nice. I never had a problem with lost secondaries (now AMCAS was another story last year). When it comes time for you to send letters accepting a spot in a class that has been offered to you, then you can splurge on FedEx or UPS. However, it is not required, but it may offer you peace of mind.