What document is often required to be provided at the start of an auction?

The auction catalog or listing detailing items up for bid is a crucial document provided at the start of an auction because it serves as a comprehensive guide for participants regarding what items are available for bidding. This document typically includes descriptions of the items, their condition, estimated values, and any relevant terms or conditions related to the auction.

Providing a catalog helps auction attendees make informed decisions about their bids. It ensures transparency and offers an organized overview of the auction process, thus nurturing a competitive environment. While documents like bidding contracts, certificates of authenticity, and financial reports from sellers might be important in specific contexts, they generally don't serve the primary function of orienting participants about the items they can bid on right at the beginning of the auction.