"sua sponte"

While the absence of the district judge's hand signature was an important sign in suggesting that the two court orders came from the magistrate judge rather than the district judge, it was the use of the Latin phrase "sua sponte" to point out that the thinking and creation of the orders was not called for by an external entity what intensified the significance of the absence of hand signature even more . How natural is it for a person to put an effort to reach a decision that he thought about on his own then stops short of extending the existence of that thought from mind to the outer world with a signature?