put https://api-sandbox.getdefacto.com/loan//repayment-terms
Change the repayment terms of loan
Changing the payment method and / or date is only possible on loans that are TO_REPAY or TO_REPAY_FEES.
Changing loan repayment date is only possible once
If loan is supposed to be repaid using a sepa direct-debit, you may not be able to change the debited account number less than 3 days before the scheduled payment date because payment has already been instructed. In such case you'll get a 400 error telling you that the payment cannot be cancelled anymore.