Yes, you can post your suspicions of potential or attempted scams here. In fact, it's better to warm people before the scam actually happens rather than wait for it to be successful. Just make sure you post all the evidence you have and be prepared for a backlash if you're wrong
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Thanks. I will do that.
To my mind, using an alt as an escrow and trying to build trust warrants negative feedback from somebody in the default list.
I will post the evidence I have.