you can't send a check, coz it'd cost me way too much to cash it (likely around 15€, if it's even possible to do it).
But you can send an international postal order (it's not a postal check) from your local post office. To do so, fill & print this form :http://www.managames.com/tennismanager/ ... er_en.html
Then, you give money at your post office, and my postman will hand me this money. This is safe, but usually slow when coming from another country (count around 3 weeks). It should cost around 5 Euros.
If International Postal Order doesn't exist in your country, you can also send a bank note in a registered letter (*). This is illegal, so if the customs check the letter, they could confiscate it ; but for small amounts, I guess they don't care. So far, for the few customers who paid like this, it always worked.
(*) Registered letter = pay a little extra to have insurance the letter will arrive at destination .