Which action could lead to the suspension of an auctioneer's license?

The suspension of an auctioneer's license can occur when an auctioneer engages in fraud or unethical conduct. This is because professional conduct is paramount in maintaining the integrity of the auctioneer profession. Auctioneers are expected to adhere to a strict code of ethics and legal standards that protect both buyers and sellers. Fraudulent behavior can include misrepresentation of items, theft, or deceitful practices aimed at gaining an unfair advantage during auctions. Such actions undermine the trust in auction markets and can result in significant penalties, including suspension or revocation of the auctioneer’s license.

In contrast, while incorrectly recording a sale could lead to serious issues, it typically would not result in suspension unless it was part of a pattern that indicated unethical behavior. Changing auction dates may sometimes cause confusion, but it doesn't inherently violate ethical or legal standards and is often permissible if communicated properly. Disputes with a buyer, while certainly requiring resolution, are a regular part of business operations and do not in themselves constitute a violation of auctioneer regulations unless they involve unethical conduct.