How can i report someone whos trying to scam?

Many users use other accounts they own for storage...this doesn't mean they are trying to scam you. Screens of items held in accounts don't prove much, you need to clearly discuss the trade in full with the other user AND have the user verify themselves in the chat what is being traded also which shows that both parties agreed to the terms. You screen shot the FULL screen - most users that wish to make a report make the mistake of cropping the chat boxes to only show the chat but it excludes date/time etc.. we can't accept edited or cropped screen shots.

We do accept reports of scam attempts, the issue with this particular situation is that there is no trade agreement, so we cannot prove the user's intent was to scam. If there is "100% evidence of an attempt" to scam in a report by our standards, then we accept the report. We only ban based on evidence, and if there is not sufficient evidence we don't ban a user.

Its always still worth reporting, even if the report ultimately gets rejected for lack of sufficient evidence. All the archived/invalid reports on a user are still searchable from the users SR profile. You can use that information to make an informed decision if the user is likely to cause you troubles or worse.