The IRS Office of Professional Responsibility (OPR) has created an online lookup table — a searchable Excel file — that allows the public to find out if a tax practitioner has been reported for violations of their professional responsibility.  Until this new tool was released, one had to search every single IRS Bulletin for announcements.  Now the information is compiled into one document.  It includes 25 years of info (the IRS requirement for maintaining records on the topic) on more than 3,000 censures, suspensions, disbarments and other restrictions.

More info here, including how best to search the file: IRS Makes It Easier to Look Up Disciplinary Records of Tax Practitioners

I’ve inherited enough clients from unscrupulous prior preparers, that I intend to make searching this document a standard practice before beginning a new client’s return.