In 2013, every letter mailed from the German sites has borne the corporate slogan “Bayer: 150 Years of Science For A Better Life.” This special postmark was bringing the attention of millions to the company anniversary. Selected mailings featured a specially produced Bayer stamp – for example the invitations to the Annual Stockholders' Meeting in 2013.

The highlight of the anniversary activities in the postal sector has been a foldable portocard, which contained a valid 58-cent stamp. The company awarded this stamp as a prize during various anniversary activities, for example. It is not available commercially or from the post office and is only valid in Germany.