Warning: the people presenting themselves as the organizers of "tandem" and using also the same locations previously used by Tandem do not represent Tandem Warsaw International Community in anyway and no one of the organizers have been delegates by tandem administration. It is a blatant case of plagiarism and this is why we have set an official website tandeminternational.waw.pl. Attending those meetings you are not at Tandem Warsaw International Community and are there under your responsibility and at your own risk in the hands of people unknown to us. Tandem Warsaw International Community communicates with its members only by official channels and by email to the subscribers.