11 U.S.C. Section 501
Filing of proofs of claims or interests
(a) A creditor or an indenture trustee may file a proof of claim. An equity security holder may file a proof of interest.
(b) If a creditor does not timely file a proof of such creditor's claim, an entity that is liable to such creditor with the debtor, or that has secured such creditor, may file a proof of such claim.
(c) If a creditor does not timely file a proof of such creditor's claim, the debtor or the trustee may file a proof of such claim.
(d) A claim of a kind specified in section 502(e)(2), 502(f), 502(g), 502(h) or 502(i) of this title may be filed under subsection (a), (b), or (c) of this section the same as if such claim were a claim against the debtor and had arisen before the date of the filing of the petition.
11 u.s.c. Section 502
Allowance of claims or interests
(a) A claim or interest, proof of which is filed under section 501 of this title, is deemed allowed, unless a party in interest, including a creditor of a general partner in a partnership that is a debtor in a case under chapter 7 of this title, objects.
(b) Except as provided in subsections (e)(2), (f), (g), (h) and (i) of this section, if such objection to a claim is made, the court, after notice and a hearing, shall determine the amount of such claim in lawful currency of the United States as of the date of the filing of the petition, and shall allow such claim in such amount, except to the extent that -
(1) such claim is unenforceable against the debtor and property of the debtor, under any agreement or applicable law for a reason other than because such claim is contingent or unmatured;
(2) such claim is for unmatured interest;
(3) if such claim is for a tax assessed against property of the estate, such claim exceeds the value of the interest of the estate in such property;
(4) if such claim is for services of an insider or attorney of the debtor, such claim exceeds the reasonable value of such services;
(5) such claim is for a debt that is unmatured on the date of the filing of the petition and that is excepted from discharge under section 523(a)(5) of this title;
(6) if such claim is the claim of a lessor for damages resulting from the termination of a lease of real property, such claim exceeds -
(A) the rent reserved by such lease, without acceleration, for the greater of one year, or 15 percent, not to exceed three years, of the remaining term of such lease, following the earlier of -
(i) the date of the filing of the petition; and
(ii) the date on which such lessor repossessed, or the lessee surrendered, the leased property; plus
(B) any unpaid rent due under such lease, without acceleration, on the earlier of such dates;
(7) if such claim is the claim of an employee for damages resulting from the termination of an employment contract, such claim exceeds -
(A) the compensation provided by such contract, without acceleration, for one year following the earlier of -
(i) the date of the filing of the petition; or
(ii) the date on which the employer directed the employee to terminate, or such employee terminated, performance under such contract; plus
(B) any unpaid compensation due under such contract, without acceleration, on the earlier of such dates;
(8) such claim results from a reduction, due to late payment, in the amount of an otherwise applicable credit available to the debtor in connection with an employment tax on wages, salaries, or commissions earned from the debtor; or
(9) proof of such claim is not timely filed, except to the extent tardily filed as permitted under paragraph (1), (2), or (3) of section 726(a) of this title or under the Federal Rules of Bankruptcy Procedure, except that a claim of a governmental unit shall be timely filed if it is filed before 180 days after the date of the order for relief or such later time as the Federal Rules of Bankruptcy Procedure may provide.
(c) There shall be estimated for purpose of allowance under this section -
(1) any contingent or unliquidated claim, the fixing or liquidation of which, as the case may be, would unduly delay the administration of the case; or
(2) any right to payment arising from a right to an equitable remedy for breach of performance.
(d) Notwithstanding subsections (a) and (b) of this section, the court shall disallow any claim of any entity from which property is recoverable under section 542, 543, 550, or 553 of this title or that is a transferee of a transfer avoidable under section 522(f), 522(h), 544, 545, 547, 548, 549, or 724(a) of this title, unless such entity or transferee has paid the amount, or turned over any such property, for which such entity or transferee is liable under section 522(i), 542, 543, 550, or 553 of this title.
(e)(1) Notwithstanding subsections (a), (b), and (c) of this section and paragraph (2) of this subsection, the court shall disallow any claim for reimbursement or contribution of an entity that is liable with the debtor on or has secured the claim of a creditor, to the extent that -
(A) such creditor's claim against the estate is disallowed;
(B) such claim for reimbursement or contribution is contingent as of the time of allowance or disallowance of such claim for reimbursement or contribution; or
(C) such entity asserts a right of subrogation to the rights of such creditor under section 509 of this title.
(2) A claim for reimbursement or contribution of such an entity that becomes fixed after the commencement of the case shall be determined, and shall be allowed under subsection (a), (b), or (c) of this section, or disallowed under subsection (d) of this section, the same as if such claim had become fixed before the date of the filing of the petition.
(f) In an involuntary case, a claim arising in the ordinary course of the debtor's business or financial affairs after the commencement of the case but before the earlier of the appointment of a trustee and the order for relief shall be determined as of the date such claim arises, and shall be allowed under subsection (a), (b), or (c) of this section or disallowed under subsection (d) or (e) of this section, the same as if such claim had arisen before the date of the filing of the petition.
(g) A claim arising from the rejection, under section 365 of this title or under a plan under chapter 9, 11, 12, or 13 of this title, of an executory contract or unexpired lease of the debtor that has not been assumed shall be determined, and shall be allowed under subsection (a), (b), or (c) of this section or disallowed under subsection (d) or (e) of this section, the same as if such claim had arisen before the date of the filing of the petition.
(h) A claim arising from the recovery of property under section 522, 550, or 553 of this title shall be determined, and shall be allowed under subsection (a), (b), or (c) of this section, or disallowed under subsection (d) or (e) of this section, the same as if such claim had arisen before the date of the filing of the petition.
(i) A claim that does not arise until after the commencement of the case for a tax entitled to priority under section 507(a)(8) of this title shall be determined, and shall be allowed under subsection (a), (b), or (c) of this section, or disallowed under subsection (d) or (e) of this section, the same as if such claim had arisen before the date of the filing of the petition.
(j) A claim that has been allowed or disallowed may be reconsidered for cause. A reconsidered claim may be allowed or disallowed according to the equities of the case. Reconsideration of a claim under this subsection does not affect the validity of any payment or transfer from the estate made to a holder of an allowed claim on account of such allowed claim that is not reconsidered, but if a reconsidered claim is allowed and is of the same class as such holder's claim, such holder may not receive any additional payment or transfer from the estate on account of such holder's allowed claim until the holder of such reconsidered and allowed claim receives payment on account of such claim proportionate in value to that already received by such other holder. This subsection does not alter or modify the trustee's right to recover from a creditor any excess payment or transfer made to such creditor.
Bankruptcy Rules Rule 3002
Filing Proof of Claim or Interest
(a) Necessity for Filing. An unsecured creditor or an equity security holder must file a proof of claim or interest in accordance with this rule for the claim or interest to be allowed, except as provided in Rules 1019(3), 3003, 3004 and 3005.
(b) Place of Filing. A proof of claim or interest shall be filed in accordance with Rule 5005.
(c) Time for filing. In a chapter 7 liquidation, chapter 12 family farmer's debt adjustment, or chapter 13 individual's debt adjustment case, a proof of claim shall be filed within 90 days after the first date set for the meeting of creditors called pursuant to Sec. 341(a) of the Code, except as follows:
(1) On motion of the United States, a state, or subdivision thereof before the expiration of such period and for cause shown, the court may extend the time for filing of a claim by the United States, a state, or subdivision thereof.
(2) In the interest of justice and if it will not unduly delay the administration of the case, the court may extend the time for filing a proof of claim by an infant or incompetent person or the representative of either.
(3) An unsecured claim which arises in favor of an entity or becomes allowable as a result of a judgment may be filed within 30 days after the judgment becomes final if the judgment is for the recovery of money or property from that entity or denies or avoids the entity's interest in property. If the judgment imposes a liability which is not satisfied, or a duty which is not performed within such period or such further time as the court may permit, the claim shall not be allowed.
(4) A claim arising from the rejection of an executory contract or unexpired lease of the debtor may be filed within such time as the court may direct.
(5) If notice of insufficient assets to pay a dividend was given to creditors pursuant to Rule 2002(e), and subsequently the trustee notifies the court that payment of a dividend appears possible, the clerk shall notify the creditors of that fact and that they may file proofs of claim within 90 days after the mailing of the notice.
