monitory letter

from Bouvier's Law Dictionary, Revised 6th Ed (1856)
MONITORY LETTER, eccl. law. The process of an official, a bishop or other 
prelate having jurisdiction, issued to compel, by ecclesiastical censures, 
those who know of a crime or other matter which requires to be explained, to 
come and reveal it. Merl. Repert. h.t. 
    

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