Hi everyone!

Today we'd like to talk about double-spending.

We've had a player named yakuza699 – he's got the same username on bitcointalk and is actually a Hero member here, which means he's a respected part of the community. Here is a link to his profile here: https://bitcointalk.org/index.php?action=profile;u=136722.

He's been playing Pocket Dice for a while now using the same strategy over and over: he makes a large deposit, places a couple of low-risk ALL IN bets, and then withdraws. All his game sessions have been profitable for him though yesterday he returned to Pocket Dice, deposited 71.38 BTC and lost them all. This happens sometimes as this is the game of chance. What happened next was he double-spent his deposit transaction.

So why are we writing all this? Just to say you all should beware of any kind of cooperation with yakuza699. Moreover, you should never seriously rely on user's rating at Bitcointalk.

Has anyone of you ever had any cooperation with yakuza699? did he also double spend in your web services?
Any ideas on how to solve this will be aprreciated.