A trust set up by a settlor who reserves the right to terminate the trust but other than that, agrees to assert no power over the trust, which is administered without updates, advice, instruction or account to the beneficiary or settlor, or the retention of any other measure of control over the trust's administration except the right to terminate it.
In Canada, for example, it is common for government ministers to vest all their investment property to a blind trust to avoid any conflict of interest.