Sealing is a well-known technique to mark ownership and identity on objects in order to protect their integrity. It is essential to administrative activities taking place beyond the face-to-face sphere of interactions. During the Anatolian−Old Assyrian Trade Period seals were intensively used on different clay supports: on written objects such as tablets or envelopes or on clay lumps securing the opening of objects. This paper reviews sealing assemblages from Kültepe to show similarity and diversity in the production, use, and deposition of the sealings during the Anatolian−Old Assyrian Trade Period. It seeks to highlight their functions at Kültepe and to spotlight some connections with assemblages from other sites.