In case you missed it, ChipMixer.
If you are not satisfied with our service, please contact support in 48h (while your session is not yet deleted) and we can help you. Waiting few days then writing on forum while advertising bitmixer looks bit weird.
I have a question that probably a lot of users just starting to use chipmixer will probably share. What if the session is automatically destroyed after 48h and something happens, say the funds get stolen/private key doesn't work? Will support be able to help the user then?
-snip-
@ChipMixer: What do you do if someone claims you have stolen Bitcoin from private key you have given. If it is a small amount, it may not have much impact because of the trust you have. But, what happens if it is a large amount? I hope you have already thought about it and have come up with a solution or is working on one! Good luck! By the way, I have sent you a PM! Please reply! Thanks!
As with other mixers and as is the nature of Bitcoin, there's not much that can be proven when you accuse someone of stealing.
For example, if a mixer/wallet/exchange is accused of stealing, no one can prove who actually spent the bitcoin since the only proof would be held by the person stealing and by the original owner, who might be the same person if the accusation is false. How could people know who is being truthful if the result would be the same regardless of whether the original owner spent the bitcoin or if the other party used the private key? It could even just be a hacker who managed to get the private key through other means. So in the end it all just comes down to trust and reputation of ChipMixer.