As a member of the Association of Professional Genealogists, I abide by the APG Code of Ethics and Professional Practices (apgen.org).
I recommend that before anyone performs research, or hires someone to perform research, that one reads this “code”. One can find the web page by going to apgen.org, hovering your mouse over “About Us”, and clicking on “Code of Ethics”.
According to the web page (Association of Professional Genealogists, Code of Ethics and Professional Practices (https://www.apgen.org/ : accessed 30 March 2017), “The APG Code of Ethics and Professional Practices serves to promote: (1) a truthful approach to genealogy, family history, and local history; (2) the trust and security of genealogical consumers; and (3) careful and respectful treatment of records, repositories and their staffs, other professionals, and genealogical organizations and associations.”
Check it out!