Does one's liability become absolved by the creditor selling his debt to another company for less than its value? And is the debtor obligated to repay the original debt to the company, or is he not? Bearing in mind that the company is demanding the original debt plus late fees.

Selling the debt in the manner described is not permissible. However, this does not absolve the questioner of liability; their responsibility for this debt remains until it is repaid or forgiven by the creditor. A person's liability is not discharged except by one of the means of debt extinguishment. What is religiously obligatory is the repayment of the principal debt, without its usurious interest, whether to the original creditor or to the collection agency.