Where the button is
Pick a reason: Spam, Scam or fraud, Prohibited item, Harassment, or Something
else. That is the whole form. There is no free-text box, so the reasons stay
things a moderator can act on at a glance.
On a trade card, which button you get depends on which side you are. The lister
reports the negotiation comment, because the offerer wrote it. The offerer
reports the listing post, because the lister wrote that. Each of you can report
what the other published.
What happens next
The report goes to the moderators of the subreddit you are in, alongside every other report they receive. Trade Post does not remove anything, hide anything, or decide anything: moderators do. You are not identified to the other trader.Reporting through Trade Post is the same as reporting on Reddit, and reaches
the same queue. It exists because Reddit’s own report button is not reachable
from inside the app, and telling you to go and find the post again is not a
reporting flow. Either route works.