Massachusetts Uniform Rules on Impoundment Procedure Rule 3: Ex Parte Impoundment
An ex parte order of impoundment may be granted by the court without notice only upon written motion supported by affidavit in the manner provided in Rule 2 and only upon a showing that immediate and irreparable injury may result before a party or interested third person can be heard in opposition. An ex parte order of impoundment shall be endorsed with the date of issuance; shall be filed forthwith in the clerk's office and entered of record; and shall expire by its terms within such time after entry, not to exceed ten days, as the court fixes, unless within the time so fixed, the court extends the order.
If an order of impoundment is granted without notice, the matter shall be set down for hearing at the earliest possible time, and in any event within ten days. On two days' notice to the party who obtained the order of impoundment without notice or on such shorter notice as the court may prescribe, a party or interested third person may move for modification or termination.
An ex parte order of impoundment may be requested prior to the filing of the material sought to be impounded.