Only CBP can place a bond into insufficient status which means the bond still exists, but entries cannot be made until the bond is placed back into sufficient status. A bond can become insufficient for a variety of reasons, including massive outstanding debts or claims, a large or risky entry, a bad address (return of USPS mail) or inadequate bond limit. Sometimes CBP provides notice of 15 days and sometimes the bond become insufficient without notice.

Note: a bond is not subject to any form of deficiency of limits due to the amount of import value or of import duties. No matter the volume of the imported values or duties paid, if a bond is sufficient, any import can be made under the bond. Bond limits are not subject to depletion.