Like some of you, I have the habit of mailing myself postcards from places I've visited, and of course mailing them with the local stamps that I manage to purchase. Hunting down a post office and/or finding one that sell stamps in a foreign country is often the most exciting part of the adventure.
I usually write down what I did at that place. So instead of a typical postcard people write to tell their love ones about their trip, my postcards to myself remind me what I did on the trip, and creating a piece of postal history at the same time.
So you can imagine my disappointment when I some time receive postcards without postmark! And worse yet, some time the postmark has missed the stamp altogether! (as I don't even have the option to mailing it again)
Should I mail these postcards again next time I visit? Or will I ruin their collector's value (the little that they will have) since I usually put the date on the postcards (not the date I dropped them in the mail, but the date of my mini travelogue). Worse yet, it may get lost in the mail, or somehow not get delivered!