The Debtors sought disallowance of certain unsecured claims because creditors failed to attach sufficient documentation under Bankruptcy Rule 3001(c). The Court overruled the Debtors' objections because (1) Bankruptcy Rule 3001(c) does not create an independent ground to disallow claims; (2) failure to comply with the documentation requirements in Bankruptcy Rule 3001(c) is an evidentiary defect that only deprives a claim of its prima facie validity; and (3) failure to comply with Bankruptcy Rule 3001(c) merely results in the claimant having the burden of proof if an objection to the claim is filed, but that objection must meet or surpass the evidence set forth in the claim. The Debtors' objections were found insufficient because many of the claims were entitled to prima facie validity and the Debtors did not rebut that presumption with sufficient evidence. The Debtors' objections to proofs of claim not entitled to prima facie validity were overruled because the Debtors did not come forward with any evidence that was of equal force to that contained in the claim to rebut the allegations made in the proofs of claim.