Ausstellende
Ausstellende is the present participle of the German verb ausstellen and is used as an attributive adjective to describe a person, entity, or institution that issues something or displays something. The meaning depends on the context: in administrative and legal language it typically refers to the authority or office responsible for issuing documents, licenses, or certificates; in cultural or commercial contexts it can denote someone or something that is displaying or exhibiting items.
In usage, ausstellende often appears before a noun in formal phrasing. For example, die ausstellende Behörde
Grammatically, ausstellende is the participle I form combined with adjective endings to agree with the noun