Does Prosper require an appraisal?

I'm curious about the lending process on Prosper, specifically regarding the need for an appraisal. Does Prosper, as a peer-to-peer lending platform, mandate an appraisal for borrowers to secure a loan? I understand that traditional lending institutions often require appraisals to assess the value of collateral, but I'm wondering if this is also the case with Prosper. Could you clarify the appraisal requirements, if any, for borrowers seeking loans on this platform?