Apply for a commercial mail transport permit
Source: BUS Rheinland-PfalzIf you wish to transport letters commercially, you must apply for a permit.
You always need a license for the commercial transport of letters if you collect, forward or deliver letters. To obtain this license, you must prove that you have the necessary reliability, ability and expertise.
If you only transport letters as an assistant for a licensed postal service provider, you do not need a license. You also do not need a license if you are transporting letters that are enclosed with another item and only concern its contents (e.g. an invoice).