Русско-англо-русский юридический словарь

If you act in bad faith then you act in a dishonest or unacceptable way (TransLegal - Legal English Online)

certificate of insurance (COI). Document issued by an insurance company, it certifies that an insurance policy has been bought and shows an abstract of the most important provisions of the insurance contract. But it is not a substitute for the actual policy, and is normally a non-negotiable document-it cannot be assigned to a third party, and is unacceptable under the terms of a letter of credit and in making a claim. (BusinessDictionary)

Definition of blacklist - a list of people or things that are regarded as unacceptable or untrustworthy and should be excluded or avoided. (Oxford Living Dictionaries)

There are other ways, however, of showing diplomatic anger. One of the most common is the withdrawal of an ambassador ‘for consultations.’ This is a signal that stops short of a formal break in diplomatic relations but makes clear that a government finds the behaviour of another government unacceptable. (Diplomat Magazine)