1. You cannot file Chapter 7 without including your house. However, the trustee may decide that it cannot be sold for any value, so you may have been permitted to keep the property.
2. Mortgage companies and other creditors do not report credit scores. They report account status. So, if you mean that the creditor stopped reporting your account status, and refuses to provide it retroactively, then that makes sense, at least from a technical viewpoint.
3. Assuming that I understand your facts, then I strongly suggest that you try a few different lenders, because the Fannie Mae rules (the rules that every bank/institutional lender and mortgage broker uses to underwrite loans) does not require a specific credit score. Quoting from the Fannie Mae guide:
Public Records, Foreclosures, and Collection Accounts
A credit history that includes any significant derogatory credit event is considered high risk. Significant derogatory credit events include bankruptcy filings, foreclosures, deeds-in-lieu of foreclosure, preforeclosure sales, mortgage charge-offs, judgments, tax liens, or accounts that have been turned over to a collection agency.
The more recent such events occurred, the more adverse the impact is on the credit profile. Although most public record information is retained in the credit history for seven years (ten years for bankruptcies), as time passes, it does become less significant to DU’s credit evaluation.
DU evaluates inquiries made within the most recent 12 months of the credit report date. Research has shown that a high number of inquiries can indicate a higher degree of risk. However, multiple inquiries made by different mortgage lenders or different auto loan creditors within the same time frame is not viewed by DU as multiple inquiries (these types of inquiries generally reflect borrowers shopping for favorable rates or terms). A borrower who has frequently applied for, or obtained, new or additional credit represents a higher risk.
Bankruptcy (Chapter 7 or Chapter 11)
A four-year waiting period is required, measured from the discharge or dismissal date of the bankruptcy action.
As you can see from the selling guide, after four years, the bankruptcy is not considered a disqualifying factor. And the only negative issue with the failure to report your account is that there's no history. But, a reasonably competent loan underwriter will know that you filed bankruptcy, so you had no obligation to pay the mortgage, and thus the mortgage company had no corresponding obligation to report your account.
The point here is that the lender has chosen, on its own internal policy, to turn this reporting issue into a disqualifying factor. There's no legal reason why it should be so. Consequently, you need to try some different lenders, because if you have income, and equity in your property, then you will get a loan from some lender. It may simply take longer to find the right fit.
On the direct issue of forcing the lender to retroactively report your account, you could sue in state or federal court under the federal Fair Credit Reporting Act (FCRA), on grounds that the lender is materially misrepresenting your credit status. But, that could take months or even years to resolve. So, in my opinion, you will save a lot of time by trying different lenders until you find one that will be more accommodating. Even if you have to pay more interest, it won't likely be as much as you would have to pay a lawyer to represent you in court.
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