Terrible Experience with Coinmixer.es - supposed to be one of the best mixers out there!

I’m sorry to say that I have had a very negative experience with https://coinmixer.es and would strongly urge people to steer well clear.

I tumbled an admittedly small amount of BTC to try them out and identified a few glaring issues. I am still trying to resolve this issue with [support@coinmixer.es](mailto:support@coinmixer.es) and they have been less than helpful.

I set mixed coins to be returned to three of my addresses with delays of 1, 2 and 3 hours. When nothing had come back, I contacted support and was told there was some error. Even now, (the second time I have seen this) their so-called “Guarantee Letter” does NOT verify as signed. At all. I checked their Public GPG Key 0x698149872A32A8BD – which I cannot find on any Key Server bar their site. This is another red flag.

They have given me some rubbish excuse that they had some issue or other with their server and asked me to send the guarantee letter, my Operating System and wallet software used. Explaining that I use Electrum, they sent me some suspicious looking code to enter into the Electrum console, promising me that this would immediately fix my issue. I understood it was to sign a message and let them know that the output Addresses were mine. Unsurprisingly, the code spat out an error, suggesting (unhelpfully) that I contact support! I think they have a cheek to expect me to cryptographically sign my emails to support when their own “Guarantee Letters” are completely worthless!
The output of “$gpg2 –verify guarantee_letter.txt” sent back:
gpg: [don’t know]: invalid packet (ctb=0a)
gpg: no signature found
gpg: the signature could not be verified.

I then attempted “$gpg2 –list-packets guarantee_letter.txt” and got:

# off=0 ctb=ff tag=63 hlen=2 plen=19 new-ctb
:packet 63: length 19 – gpg control packet# off=21 ctb=cb tag=11 hlen=2 plen=0 partial new-ctb
:literal data packet:
mode t (74), created 0, name=””,
raw data: unknown length

I have now sent them back an email which I have signed with all three output addresses. To date, I’ve received no response.

I’ve sent a transaction (txid:60657f2f08813f9e5708e68e3c79dd56e29c0bf5b07f94bd5e0b9c320bc21a6e) now with the OP_RETURN “Stay away from Coinmixer.es” and will continue to send similar transactions to the BTC Blockchain until they resolve this for me.

In all, a wholly unacceptable and unsatisfactory experience. Save yourselves a lot of trouble and stay away from these.

submitted by /u/sonofbelial1983
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