"Every person shall have the right individually or jointly with others to address written requests or complaints to competent authorities and to the legislature."
According to article 17, everyone in Germany can directly take their requests or complaints to the government or the authorities. The state must examine all requests or/and complaints and react to them. If a person has an inquiry or wants to complain, they can simply write a letter or an email to the government, i.e. the responsible authority (for instance, the Tax Office). The only requirement is that the name and address of the person are mentioned in the correspondence.