Mike Brandly is one of the most respected auction writers (and auctioneers) in the country and many of us who are actually auctioneers (as opposed to a company that happens to hold auctions) read his page as it covers a ton of issues from ethics to legal to just good business practices.
The article linked is about shill bidding.
https://mikebrandlyauctioneer.wordpr...shill-bidding/
The real meat is in the PDF he linked in his blog.