In 1287, a report mentions Vogt Berthold taking office in the town, and further mentions that Grimmen had already been granted Lübeck law before. The actual charter is lost, thus the exact date when the town received Lübeck law remains uncertain.
A report from 1287 records Vogt Berthold's appointment in the town, and it is also mentioned that Grimmen had already been granted Lübeck laws prior to this. However, the original charter has been lost, making it impossible to determine the exact date when the town received Lübeck law.