You have to be honest to your pen pal. You do not want a friend who does not tell the truth all the time. You must not make lies to your letters and be true to yourself on any information you want your pen pal to know. Trusting one another can strengthen the very foundation of your relationship.
Today we have an Internet version of the same thing. People go to these Pen pal sites to find love. It seemed a bit weird at first like most things that are new and different, but eventually we became used to the idea. Is it really any different than meeting in any other manner? You still have to weed through the riffraff. You still have people presenting themselves as something other than what they really are. You still have crooks and cheats, predators. And you still have honest real folks looking for true love. You still have single parents worried that people won't accept their kids as part of a package deal. You still have married folks looking for a way to cheat on their partners. The only real difference is how fast the system works. You can weed through a heck of a lot of less than desirable matches really fast and you don't even have to waste time or money on dinner and movies, or on babysitters and a new dress.