Bingo. Yes object as they attempt to present the declarations. Then once they are done with the affirmative case you can move to dismiss the OSC for failure to prove the case.
The above information does not establish an attorney client relationship nor is it meant to provide legal advice.
The witnesses may show up--under the new aw the judge must hear live testimony, It may be a but of a blood bath as most pro se litigants do not know the rules of cross examination.
In addition to the responses already provided, you can also object if the third party declarations are not signed under penalty of perjury. If either of you do choose to call a third party as a witness, make sure you are aware of the proper objections to make so that certain evidence does not come in. An experienced attorney can either walk you through the process and/or assist you in court. Best of luck!
If you found this answer helpful, let me know by clicking the "Mark as Good Answer" button at the bottom of this answer. This response is intended to be a general statement of law, should not be relied upon as legal advice, does not create an attorney/client relationship and does not create a right to continuing email exchanges.
Sign up to receive a 10-part series of useful information and legal advice about the divorce process.
Years licensed, work experience, educationLegal community recognition
Peer endorsements, associations, awardsLegal thought leadership
Publications, speaking engagementsDiscipline