Indiana Code Title 24. Trade Regulation § 24-4.5-3-408

Sec. 408. (1) This section applies to consumer loans, including revolving loan accounts.

(2) Except as provided in subsection (3), a creditor shall credit a payment to a consumer's account as of the date of receipt, except when a delay in crediting does not result in a finance charge or other charge, including a delinquency charge under section 203.5 of this chapter.  A delay in posting does not violate this section so long as the payment is credited as of the date of receipt.

(3) If a creditor specifies in writing requirements for the consumer to follow in making payments, but accepts a payment that does not conform to the requirements, the creditor shall credit the payment within five (5) days of receipt of the payment.

(4) If a creditor fails to credit a payment as required by this section in time to avoid the imposition of a finance or other charge, including a delinquency charge, the creditor shall adjust the consumer's account so that the charges imposed are credited to the consumer's account during the next payment period.