The Patent Baristas June 9, 2010 blog entry contains a warning about unsolicited mailings to applicants and owners of international patents, designs and trade marks inviting them to enter their intellectual property in various registers, publications, or databases for a fee. The mailing are in official looking envelopes and come from official sounding organizations. To read more about these scams, access "
A Warning About Requests for Payment of Patent Fees" by Stephen Albainy-Jenei.