I saw someone's post regarding a scammy commissioner today, and wanted to share my own story featuring an individual who failed to uphold their end of the deal when it came to paying for what they ordered. Below you'll find a stiched together version of the end of the conversation we had on Discord, and an image proof that I completed their commission (with a bit more aggressive watermarking than usual, since I'm sure they're going to see this journal). I unfriended them immediately after they linked "their" YouTube channel, which meant they couldn't message me anymore. On the date of the last few messages I received a friend request from a completely different name, which, after I accepted it, revealed our previous correspondence. Their name has changed again since then, and I forgot to take screenshots of those messages at the time, so that's why you see their current name at the bottom.
Their handle on Discord is Dargon#0115 (was Desert-Winds#7281 when I wrote this journal, I try to update this in case I see them change it again). They initially used the handle "HellMare." when they contacted me, and they used the DeviantArt account dragonslayer1896 when I gave them my Discord via DA notes. Since they have used over 3 different Discord usernames since I first added them, I suggest that if you want to make sure whether the person you're talking to is them, enable "Appearance > Advanced > Developer mode" in Discord settings, right click the name, and press "Copy ID". Paste (Ctrl+V) the ID somewhere, and if it matches this, it's them: 111666348307869696.
(Click the images for larger size.)