(7) The Registrar shall send notice of the resealing to the Court which made the grant. (8) Where notice is received in the Registry from outside the Federal Capital Territory, Abuja, of the resealing of a grant made in the Federal Capital Territory, Abuja, notice of any amendment or revocation of the grant shall be sent to the Court by which it was resealed. 56. If the Registrar is satisfied that a grant should be amended or revoked, he may make an order accordingly: Provided that in special circumstances, no grant shall be amended or revoked under this rule except on the application or with the consent of the person to whom the grant was made. 57. (1) Any person who wishes to ensure that no grant is sealed without notice to himself may enter a caveat in the Registry. (2) An person who wishes to enter a caveat (in this rule called "the caveator") may do so by completing Form 189 in the Appendix to these Rules in the appropriate book at the Registry and obtaining an acknowledgement of entry from the proper officer or by sending through the post at his own risk a notice in Form 189 to the Registry in which he wishes the caveat to be entered. (3) Where the caveat is entered by a legal practitioner on the caveator's behalf, the name of the caveator shall be stated in Form 189 in the Appendix to these Rules. (4) Except as otherwise provided by this rule, a caveat shall remain in force for six months from the date on which it is entered and shall then cease to have effect, without prejudice to the entry of a further caveat or caveats. (5) The Registrar shall maintain an index of caveats entered in the registry and on receiving an application for a grant in the Registry he shall cause the index to be searched and shall notify the applicant in the event of a caveat having been entered against the sealing of a grant for which application has been made. (6) The Registrar shall not allow any grant to be sealed if he has knowledge of an effective caveat in respect thereof: Provided that no caveat shall operate to prevent the sealing of a grant on the day on which the caveat is entered. (7) A caveator may be warned by the issue from the Registry of warning in Form 190 in the Appendix to these Rules at the instance of any person interested (in this rule called "the person warning") which shall state his interest and if he claims under a will, the date of the will and shall require the caveator to give particulars of any contrary interest which he may have in the estate of the deceased and every warning or a copy thereof shall be served on the caveator. (8) A caveator who has not entered an appearance to a warning may at any time withdraw his caveat by giving notice at the Registry and the caveat shall thereupon cease to have effect and if he has been warned, the caveator shall forthwith give notice of withdrawal of the caveat to the person warning. (9) A caveator having an interest contrary to that of the person warning may, within eight days of service of the warning upon him inclusive of the day of such service or at any time thereafter if no affidavit has been filed under paragraph (11) of this rule, enter an appearance in the Registry by filing Form 191 in the Appendix to these Rules and making an entry in the appropriate book and forthwith thereafter, serve on the person warning, a copy of Form 191 in the Appendix to these Rules sealed with the seal of the registry. (10) A caveator having no interest contrary to that of the person warning but wishing to show cause against the sealing of a grant to that person may, within eight days of service of the warning upon him inclusive of the day of such service, or at any time thereafter if no affidavit has been filed under paragraph (11) of this rule, issue and serve a summons for directions, which shall be returnable before the Registrar. (11) If the time limited for appearance has expired and the caveator, has not entered an appearance, the person warning may file in the Registry an affidavit showing that the warning was duly served and that he has not