Carvana Co. (NYSE:CVNA) confirmed in an SEC filing that the auto retailer reestablished an agreement with Ally Financial (ALLY) to sell the lender up to $4 billion in used-vehicle loan receivables. An amendment to the master purchase and sales agreement reestablishes the loan purchases for a period from January 3,

Carvana Co. said it has reestablished an agreement with Ally Financial Inc. to sell the lender up to $4 billion in used-vehicle loan receivables over the next year, a move that counters one claim by short seller Hindenburg Research that the financier was pulling back on their relationship.

While the online retailer is facing much criticism and serious allegations from the investment community, Carvana gained more resources from one of its key financing providers. Carvana revealed in a filing with the Securities and Exchange Commission on Monday that it amended the second amended and restated master purchase and sale agreement with Ally Financial.