His refusal or objection must be to the court. They will decide. If they don't agree with the courts findings, (tough), they should get legal advice and you should ask the court to get involved with someon not complying with the court order. Even their action to YOU of abjection will be handled by the court, as it is against the law and automatic stay of collection actions required by creditors. Of course, sending copies of the law and court motions, perhpas instruction that they contact the court with any questions before you take the action of asking the court to take action on your behalf on their failure to follow a court order, is appropriate.
File a proof of claim
This is not a question. If your question is, "What happens when the trustee moves the Court to declare a secured claim withdrawn," then one should object, particularly if the secured creditor still has a claim. If this is chapter 7, a secured creditor has no claim except on its collateral. In chapter 13, fight for your claim.
By filing a proof of Claim, or by addressing questions/arguments to the court
You have to file a creditor's claim against the estate of the father.
If bankruptcy is over and the debt was discharged, they creditor is forever barred from taking any action to collect the debt. If the bankruptcy is still pending, the debtor cannot contact you without permission from the bankruptcy court. In either case, you may have a claim for damages against the debt collector.
A proof of claim is filed by a creditor of the decedent. That claim must be paid before any assets are distributed to the heirs. A Proof of Claim is a form that a creditor submits to the court to get paid.
Networth
Yes
The percentage paid to unsecured creditors in a Ch 13 is determined by your disposable income. Secured creditors get paid at 100%, house and car payments remain the same. What's left over gets paid out to those unsecured creditors who file proofs of claim. If a creditor does not file a claim, then that creditor does not get paid.
"How is a claim filed as an unsecured creditor to the US bankruptcy court case 07-23686-RG?"
Depends on the nature of the civil suit. If its a simple debt collection lawsuit- a chpt. 7 can discharge the debt. If its a lawsuit seeking money damages due to fraud, then it might not be dischargeable if the creditor files a proof of claim.
Not without suing. It's a credit report. You are not a creditor. If you sued and got a jugdment and she didn't pay then that would be on the credit report