This page contains frequently asked questions. If you don't see your question among the ones below, then feel free to contact us.

What is bitcoin mixing service?

The way bitcoin transactions work causes them to be chained together in a permanent public record. They are traceable along the blockchain from one bitcoin address to another. A mixing service can be used to mix one's funds with other's, with the intention of confusing the trail back to the fund's original source. Therefore, bitcoin mixing service helps protect privacy of your bitcoin transactions.

How does it work?

We have already prepared pre-mixed bitcoins for you. All you need to do is fill the form containing list of your outputs (the address where anonymized bitcoins will be sent) and send required amount of bitcoins to our bitcoin address. The mixed bitcoins will be then sent back to you automatically. You can send any number of transactions to our input address. Your bitcoins will be used in future for mixing also.

What is a "code"?

After your first exchange you will receive a special code. This code makes sure that you will never receive any of the previous coins you have added to our reserves in any subsequent transactions you make with Bitmix. In other words this ensures that you remain untraceable.

What is a "randomize" option?

If you set more than one output address you can set auto-randomization for fee, delay and percent of funds received by address. It can prevent correlation/chainanalysis attacks, we strongly recommend turn on this option for 2 or more output addresses. In other case for every output address fee will be same, percent of funds will be equal for every output address (for example for 2 adresses it will be 50/50), but delay will be randomed anyway if it will be set more than zero. It's also secure, but not so much.
When you set this option you can receive more or lower funds than you expected, but difference will not be more than 1%.

What logs are kept?

Absolutely no logs or personality identifying information are kept regarding your use of the Bitmix.Biz service. All logs are permanently removed from both our website database and from our Bitcoin wallet after your coins have been transferred out of our reserve. All forwarding entries are removed after 24 hours.

What is a Letter of Guarantee?

The Letter of Guarantee is a form of proof of our obligations.

When we provide you our Bitcoin address to which your coins should be sent to be mixed, we provide a digitally signed confirmation that this address has truly been generated by our server. For your peace of mind we always provide this letter and sign it from our main bitcoin account 1BitmixQRMUHYYEi11KBRhSfACa1BtcZrZ. You may verify our digital sign using your Bitcoin wallet.

The Letter of Guarantee is the only proof of our obligations. Please always save the Letter of Guarantee before you send us coins. We completely delete your order's data in 24 hours from our database, so only the Letter of Guarantee could help to restore your order if something goes wrong with your mixing.

How do I verify the Letter of Guarantee?

In your bitcoin wallet select File->Verify Message or Tools->Verify Message, paste our address 1BitmixQRMUHYYEi11KBRhSfACa1BtcZrZ, Letter of Guarantee as a message and digital signature. Click Verify. Most of web wallets also allow to verify signed messages.

Why should I set custom fee?

If attacker knows the service fee, he can analyze blockchain to find exact sum transferred and discover your destination account.

How many confirmations do you need to accept transactions?

Only one confirmation is needed.

How long does the mixing process take?

It's up to 24 hours. Usually it's almost instant, depends on service load.

Do you charge any fee?

Yes, our mixing fee is 0.4-4% (you can set it manually) and address fee:

0.0005 per output address

to cover transaction fees charged by miners.

What happens if my browser crashes during the mixing process?

If you haven't transferred the bitcoins to input address yet, then just create a new order. If you already sent coins to our input address - don't worry, it will be mixed and sent to your ouput addresses.

Are there any limits?


minimal amount of Bitcoin for mixing is 0.005 per output address and maximal 988.73.

Only transactions in this range will be accepted. Amounts below the minimal will be considered as donations.

Is your service accessible via Tor?

You can access our service via it's clearnet domain, but we recommend using the following Tor URL instead: http://bitmixbizymuphkc.onion/

How can I contact you?

Use email. The contact information is on the bottom of this page.

Is bitcoin mixing service, bitcoin tumbler and bitcoin laundry the same thing?

Yes, those are all synonyms.