This system should only be used by Creditor or Attorney filers.
What can be filed through the 'File a Rule 3002.1 Claim Supplement' link is the Notice of Mortgage Payment Change, Notice of Postpetition Fees, Expenses, and Charge, and Response to Notice of Final Cure Payment.
Penalty for filing a fraudulent document: Fine of up to $500,000 or imprisonment for up to 5 years, or both. 18 U.S.C. Section 152 and 3571.