Check the following main data, ideally immediately in the presence of the embassy official, after the passport has been issued.
2. The period of validity. Remember the German date format: DDMMYY (or DDMMYYYY).
3.2. Date of issue.
4. Your Last Name, First Name
6.1. BLAUE KARTE EU
6.2. Your German Employer (Company name)
1. Your photo. If there is no marks or (even small!) defects on the picture
3.1. Issuing authority - Botschaft der Bundesrepublik Deutschland CITY NAME (or Konsulat der Bundesrepublik Deutschland CITY NAME)
5. Type of Visa - D
7. Number Of Entries - MULT
If you have found the errors at home, call the embassy immediately. If nobody can answer the call, go directly to the embassy and speak to a staff member.
In theory, you can be refused entry to Germany even with a proper visa.
However, if there are errors in your visa, the probability of being refused entry is very high!