When you address a letter to the wrong address, this is an example of a situation where you inadvertently make an error.
He'd already inadvertently caused her enough problems.
The water is so crystal clear that one inadvertently steps into it.
She was mentally tough but fatigued by the events that occurred since they inadvertently met on a night similar to this one.
Having inadvertently caused the death of King Henry II.
He'd watched Rhyn and Katie's relationship unfold from its rocky beginning, when Katie inadvertently rescued Rhyn from his sentence in Hell.