Unwarranted (adjective)

Not justified or authorized; unwarranted.

Origin:

From un- (not) + warranted (justified or authorized).

Examples:

1. The use of force was unwarranted and led to many civilian deaths.
2. His accusations were unwarranted and were not supported by any evidence.
3. The punishment was unwarranted and excessive.
4. The search of the building was unwarranted and illegal.
5. The termination of his contract was unwarranted and it was not based on any valid reasons.