I wanted to know if there were some organisms that collect debts, or an international organism I can contact. I don't know if I can go to court and file a complaint against someone on the other side of the world.
You're probably aware of collection agencies - if the large international ones (such as Dun & Bradstreet, or the like) are too expensive, why don't you check the yellow pages at your customer's location?
I've heard of a company but it only collects very high amounts. They would laugh at my US$ 507. But it was my work and I deserve to be paid for it.
Nobody could dispute that, but sadly, deserving to be paid and actually getting paid are not always the same.
So far, the client hasn't treated me bad.
I beg to differ, as failure to pay is not what I would call "good treatment".
Last week I wrote him asking for the money and he said "I'm sorry for your personal problems but you will have to wait, as I do".
Yup, one of the favourite excuses...
I told that's him who's supposed to pay me, but there is no way I can make him pay.
...and guess what: your client is aware of that.
Putting a post in the BB would be declaring war to my client and I want to do it only if I have a safe way of collecting my money.
This is also a line I've heard on numerous occasions (as one of the Jobs moderators, I'm used to dealing with non-payment complaints). Sorry, but if your client is willing and able to pay, he will pay - not despite, but probably because of a Blue Board entry. You're not declaring war - you're asserting your rights.
Don't hesitate to contact me through my profile if you need to discuss the issue in more detail.