I don't know if this helps you or applies to your situation, but for your reading pleasure...you may want to read up on California Family Code at
Some sections that stand out to me...
3691. The grounds and time limits for an action or motion to set
aside a support order, or any part or parts thereof, are governed by
this section and shall be one of the following:
(a) Actual fraud. Where the defrauded party was kept in ignorance
or in some other manner, other than his or her own lack of care or
attention, was fraudulently prevented from fully participating in the
proceeding. An action or motion based on fraud shall be brought
within six months after the date on which the complaining party
discovered or reasonably should have discovered the fraud.
(b) Perjury. An action or motion based on perjury shall be
brought within six months after the date on which the complaining
party discovered or reasonably should have discovered the perjury.
(c) Lack of Notice.
(1) When service of a summons has not resulted in notice to a
party in time to defend the action for support and a default or
default judgment has been entered against him or her in the action,
he or she may serve and file a notice of motion to set aside the
default and for leave to defend the action. The notice of motion
shall be served and filed within a reasonable time, but in no event
later than six months after the party obtains or reasonably should
have obtained notice (A) of the support order, or (B) that the party'
s income and assets are subject to attachment pursuant to the order.
(2) A notice of motion to set aside a support order pursuant to
this subdivision shall be accompanied by an affidavit showing, under
oath, that the party's lack of notice in time to defend the action
was not caused by his or her avoidance of service or inexcusable
neglect. The party shall serve and file with the notice a copy of
the answer, motion, or other pleading proposed to be filed in the
(3) The court may not set aside or otherwise relieve a party from
a support order pursuant to this subdivision if service of the
summons was accomplished in accordance with existing requirements of
law regarding service of process.
3692. Notwithstanding any other provision of this article, or any
other law, a support order may not be set aside simply because the
court finds that it was inequitable when made, nor simply because
subsequent circumstances caused the support ordered to become
excessive or inadequate.
3693. When ruling on an action or motion to set aside a support
order, the court shall set aside only those provisions materially
affected by the circumstances leading to the court's decision to
grant relief. However, the court has discretion to set aside the
entire order, if necessary, for equitable considerations.
Also here are some sections of California Code of Civil Procedure Section 473 that may or may not apply.
(a) (1) The court may, in furtherance of justice, and on any terms as may be proper, allow a party to amend any pleading or proceeding by adding or striking out the name of any party, or by correcting a mistake in the name of a party, or a mistake in any other respect; and may, upon like terms, enlarge the time for answer or demurrer. The court may likewise, in its discretion, after notice to the adverse party, allow, upon any terms as may be just, an amendment to any pleading or proceeding in other particulars; and may upon like terms allow an answer to be made after the time limited by this code.
(2) When it appears to the satisfaction of the court that the amendment renders it necessary, the court may postpone the trial, and may, when the postponement will by the amendment be rendered necessary, require, as a condition to the amendment, the payment to the adverse party of any costs as may be just.
(b) The court may, upon any terms as may be just, relieve a party or his or her legal representative from a judgment, dismissal, order, or other proceeding taken against him or her through his or her mistake, inadvertence, surprise, or excusable neglect. Application for this relief shall be accompanied by a copy of the answer or other pleading proposed to be filed therein, otherwise the application shall not be granted, and shall be made within a reasonable time, in no case exceeding six months, after the judgment, dismissal, order, or proceeding was taken. However, in the case of a judgment, dismissal, order, or other proceeding determining the ownership or right to possession of real or personal property, without extending the six-month period, when a notice in writing is personally served within the State of California both upon the party against whom the judgment, dismissal, order, or other proceeding has been taken, and upon his or her attorney of record, if any, notifying that party and his or her attorney of record, if any, that the order, judgment, dismissal, or other proceeding was taken against him or her and that any rights the party has to apply for relief under the provisions of Section 473 of the Code of Civil Procedure shall expire 90 days after service of the notice, then the application shall be made within 90 days after service of the notice upon the defaulting party or his or her attorney of record, if any, whichever service shall be later. No affidavit or declaration of merits shall be required of the moving party. Notwithstanding any other requirements of this section, the court shall, whenever an application for relief is made no more than six months after entry of judgment, is in proper form, and is accompanied by an attorney's sworn affidavit attesting to his or her mistake, inadvertence, surprise, or neglect, vacate any (1) resulting default entered by the clerk against his or her client, and which will result in entry of a default judgment, or (2) resulting default judgment or dismissal entered against his or her client, unless the court finds that the default or dismissal was not in fact caused by the attorney's mistake, inadvertence, surprise, or neglect. The court shall, whenever relief is granted based on an attorney's affidavit of fault, direct the attorney to pay reasonable compensatory legal fees and costs to opposing counsel or parties. However, this section shall not lengthen the time within which an action shall be brought to trial pursuant to Section 583.310.
(c) (1) Whenever the court grants relief from a default, default judgment, or dismissal based on any of the provisions of this section, the court may do any of the following:
(A) Impose a penalty of no greater than one thousand dollars ($1,000) upon an offending attorney or party.
(B) Direct that an offending attorney pay an amount no greater than one thousand dollars ($1,000) to the State Bar Client Security Fund.
(C) Grant other relief as is appropriate.
(2) However, where the court grants relief from a default or default judgment pursuant to this section based upon the affidavit of the defaulting party's attorney attesting to the attorney's mistake, inadvertence, surprise, or neglect, the relief shall not be made conditional upon the attorney's payment of compensatory legal fees or costs or monetary penalties imposed by the court or upon compliance with other sanctions ordered by the court.
(d) The court may, upon motion of the injured party, or its own motion, correct clerical mistakes in its judgment or orders as entered, so as to conform to the judgment or order directed, and may, on motion of either party after notice to the other party, set aside any void judgment or order.
Faith-a f*rm belief in something for which there is no proof...complete trust.~Merriam Webster