Instead of a signature, they would often include:
* A personal name: This was usually written in cuneiform and might include a patronymic (father's name) or a descriptive element (e.g., "the strong one").
* A title or profession: This could be a specific job like "scribe" or a more general role like "administrator."
* A reference to a deity: This was a common way to invoke divine protection or blessing.
* A combination of these elements: For example, a name followed by a title, or a name followed by a reference to a deity.
The way these elements were arranged and the specific wording used would vary depending on the context and the individual's status.
Here are a few examples:
* "Ur-Ninurta, son of Ur-Lugal, scribe": This includes a personal name, a patronymic, and a title.
* "Enheduanna, priestess of Inanna": This includes a personal name and a reference to a deity.
It's important to note that the concept of a "signature" in the modern sense didn't really exist in ancient Sumer. They used these elements to identify themselves and their role, but it wasn't a personal mark like a signature.