(a) Reports by creditor on obligor's failure to pay amount regarded as billing error After receiving a notice from an obligor as provided in section 1666(a) of this title, a creditor or his agent may not directly or indirectly threaten to report to any person adversely on the obligor's credit rating or credit standing because of the obligor's failure to pay the amount indicated by the obligor under section 1666(a)(2) of this title, and such amount may not be reported as delinquent to any third party

(a)Retention of prohibited information. A creditor may retain in its files information that is prohibited by the Act or this regulation for use in evaluating applications, without violating the Act or this regulation, if the information was obtained: (1) From any source prior to March 23, 1977; (2) From consumer reporting agencies, an applicant, or others without the specific request of the creditor; or (3) As required to monitor compliance with the Act and this regulation or other federal or state