This is an official ODERSA website.Here’s how you know

The official domain

The address of this site ends in odersa.org. Every service the association runs sits on a subdomain of odersa.org and nowhere else. If the address in your browser’s address bar does not end in odersa.org, this site is not ours.

Free, and no account

Everything is open straight away. No sign-up, no account, no password, no subscription, no advertising. Nothing is held back for those who pay, because there is nothing to pay for.

No data collected

This site does not follow you: no tracker, no tracking cookie, no measurement tool built into these pages, and nothing measured on your device. Our host counts requests in aggregate, as any server that answers does: a total, never a profile. You do not have to take our word for it: open your browser’s developer tools, go to the Network tab, and reload the page. You will see the full list of what the site asks for. Everything comes from odersa.org, nothing goes anywhere else.

Free to reuse

The content is published under the CC BY 4.0 licence. You may copy it, translate it, print it and pass it on, for your classes as much as for the people around you, on one condition only: credit ODERSA.

Write to us

Two addresses, two doors. No form, no field to fill in, no collection: your message goes through your own email software, and we keep only what you write to us.

The service team

money@odersa.org

For anything to do with the content of this site: an error, a figure to check, a word to add to the glossary, a trap we have not described, an official reference for your country, a use in a classroom or a workshop you want to tell us about, an offer to translate.

The administration of the association

contact@odersa.org

For anything to do with ODERSA itself: partnerships, funding, press, legal questions, administrative requests. The association’s identity details appear at the foot of every page, and its registered office is the one shown there.

A content error travels faster through the Report an error page: the message arrives there with the three pieces of information needed to correct it without a further exchange.

What we cannot do

If you are in difficulty right now

A missed payment coming, an overdraft settling in, several instalments that no longer fit: the first useful thing is to set the figures out plainly, and that takes five minutes with the budget calculator, without anything leaving your device. The second is to talk to a support organisation near you: the For organisations page says what kind of body does that work, and there are such bodies in many countries.