The Bankruptcy Code defines a claim as: (1) a right to payment; (2) or a right to an equitable remedy for a failure of performance if the breach gives rise to a right to payment. 11 U.S.C. § 101(5). Generally, any creditor whose claim is not scheduled (i.e., listed by the debtor on the debtor's schedules) or is scheduled as disputed, contingent, or unliquidated must file a proof of claim (and attach evidence documenting the claim) in order to be treated as a creditor for purposes of voting on the plan and distribution under it. Fed. R. Bankr. P. 3003(c)(2). But filing a proof of claim is not necessary if the creditor's claim is scheduled (but is not listed as disputed, contingent, or unliquidated by the debtor) because the debtor's schedules are deemed to constitute evidence of the validity and amount of those claims. 11 U.S.C. § 1111. If a scheduled creditor chooses to file a claim, a properly filed proof of claim supersedes any scheduling of that claim. Fed. R. Bankr. P. 3003(c)(4). It is the responsibility of the creditor to determine whether the claim is accurately listed on the debtor's schedules. The debtor must provide notification to those creditors whose names are added and whose claims are listed as a result of an amendment to the schedules. The notification also should advise such creditors of their right to file proofs of claim and that their failure to do so may prevent them from voting upon the debtor's plan of reorganization or participating in any distribution under that plan. When a debtor amends the schedule of liabilities to add a creditor or change the status of any claims to disputed, contingent, or unliquidated, the debtor must provide notice of the amendment to any entity affected. Fed. R. Bankr. P. 1009(a).