About the audience: There are at least three types of audience to be tested: speculators, collectors, and supporters of a cause. When choosing your fact checks, think of each one.
Speculators: In general, they are people who have no attachment to the negotiated content. They are looking for a good (an NFT) that can be sold soon thereafter, generating financial profit.
Collectors: People who are attracted to a particular subject, person, format, and appreciate the acquired good. To reach this audience, try to offer historical checks, memorabilia
Supporters of a cause: People who want to contribute financially to the movement of the fact checkers and/or to another topic that can be addressed in the fact checks. Think about checks on the environment, national and international politics, and health.
Choose a simple fact check: Visualize a painting on the wall containing your fact check. It needs to be succinct and straight to the point. No field for factual contestation.
Try to follow the IFCN Code of Ethics: be non-partisan in the offer of NFTs and mention your source (s) - while remaining concise.
Create a space on your website: Still following the IFCN Code of Ethics, set up a section / page on your website to show the entire collection offered in NFT. Be transparent about the fact that you are negotiating this material and remember to update public information if any of your checks are actually sold.