What you received should be a lawyer's letter from the law firm entrusted by the other party. If you want to confirm the authenticity of the document, just call the other party and ask. Generally, there will be contact information in the last lawyer's letter.
Peer-to-peer lending includes personal peer-to-peer lending (P2P peer-to-peer lending) and online microfinance. Network micro-loan refers to the micro-loan provided to customers by Internet companies through their holding micro-loan companies. Network microfinance should abide by the existing regulations of microfinance companies, give full play to the advantages of peer-to-peer lending, and strive to reduce the financing costs of customers. P2P loan business is supervised by China Banking Regulatory Commission.