A more thorough explanation:

EX DEMISSIONE

Ex demissione is a Latin term that means "upon the demise." It is a phrase that was commonly used in the title of the old action of ejectment.

For example, in a legal case, the title of the action might read "John Smith ex demissione of Jane Doe v. ABC Corporation." This means that John Smith is bringing the action on behalf of Jane Doe, who has passed away.

The term ex demissione is often abbreviated as "ex dem."

Here are some examples of how ex demissione might be used in a legal context:

• "Mary Jones ex demissione of John Smith v. XYZ Corporation"
• "William Brown ex demissione of Sarah Johnson v. DEF Inc."
• "Robert Davis ex demissione of Elizabeth Green v. GHI Company"

These examples illustrate how the term ex demissione is used in the title of a legal action to indicate that the plaintiff is bringing the case on behalf of someone who has passed away.