Well, in the days of olde when ships were made out of wood, men where made out of steel, and sheep were nervous.....

The traditional way of confirming contact with another ham radio operator was to exchange QSL cards (postcard-like document) with the details of time, date, and mode used (CW, voice, etc.). These QSL cards where the hard proof that you actually contacted these people and are used to this day.

eQSL.cc is the new, modern way to do this without all the postage expense it takes to send cards overseas.