If a creditor, within sixty days after having transmitted to an obligor a statement of the obligor’s account in connection with an extension of consumer credit, receives at the address disclosed under section
1637
(b)(10) of this title a written notice (other than notice on a payment stub or other payment medium supplied by the creditor if the creditor so stipulates with the disclosure required under section
1637
(a)(7) of this title) from the obligor in which the obligor—
(3)
sets forth the reasons for the obligor’s belief (to the extent applicable) that the statement contains a billing error,
the creditor shall, unless the obligor has, after giving such written notice and before the expiration of the time limits herein specified, agreed that the statement was correct—
(A)
not later than thirty days after the receipt of the notice, send a written acknowledgment thereof to the obligor, unless the action required in subparagraph (B) is taken within such thirty-day period, and
(B)
not later than two complete billing cycles of the creditor (in no event later than ninety days) after the receipt of the notice and prior to taking any action to collect the amount, or any part thereof, indicated by the obligor under paragraph (2) either—
(i)
make appropriate corrections in the account of the obligor, including the crediting of any finance charges on amounts erroneously billed, and transmit to the obligor a notification of such corrections and the creditor’s explanation of any change in the amount indicated by the obligor under paragraph (2) and, if any such change is made and the obligor so requests, copies of documentary evidence of the obligor’s indebtedness; or
(ii)
send a written explanation or clarification to the obligor, after having conducted an investigation, setting forth to the extent applicable the reasons why the creditor believes the account of the obligor was correctly shown in the statement and, upon request of the obligor, provide copies of documentary evidence of the obligor’s indebtedness. In the case of a billing error where the obligor alleges that the creditor’s billing statement reflects goods not delivered to the obligor or his designee in accordance with the agreement made at the time of the transaction, a creditor may not construe such amount to be correctly shown unless he determines that such goods were actually delivered, mailed, or otherwise sent to the obligor and provides the obligor with a statement of such determination.
After complying with the provisions of this subsection with respect to an alleged billing error, a creditor has no further responsibility under this section if the obligor continues to make substantially the same allegation with respect to such error.