[th0br0]

As rostigerpudel stated, the biologist confirmed the bounty in writing.

Anyhow, while IANAL, bounties are regulated by German law in (among others) BGB §657-661a. Mostly §661 and §661a. You can find a translation of those paragraphs here: http://www.gesetze-im-internet.de/englisch_bgb/englisch_bgb....

[rostigerpudel]

Thanks for pointing those out. I never noticed them before.