So It means I don't have to write any informations? Sorry but I don't what to make mistake.

Ok, but there is information that I must put information about author? I am not sure. This is a little bit difficult. There is not space for this one the post card. What exackle I must write on the project? I would like to be sure.

Hello,
Is it allowed to use Sanserifing font for commercial use, for post cards? If yes do I have to write what kind of font it is? Please help!