Hello all!

As an 18 year old university student I plan on "experiencing" life and going backpacking throughout Europe this summer with friends. Ive heard a myth that if FEDEX/UPS etc. has to send a small package or envelope somewhere, and it isn't cost effective using a company plane to ship it to the destination, that they will use passenger "couriers" instead. These "couriers" are passengers taking regular 121 transport, who don't care about departing at the last minute, that accompany the package to the destination and receive considerable discounts on their airfare in return. Ive also heard that it is very easy to "sign up" as one of these couriers and as a broke university and commercial student, this would be very helpful for my summer endeavor. I'm afraid its most likely just a myth or scam but I would appreciate any light shed on this.

Thanks for the help!
MrPlow