In fact, she added, “I would recommend people to use the BIFF method when they notice that the conversation starts to get loaded, [accusatory], or [circular and] aggressive. It’s especially useful in written communication, such as in emails or SMS.”
Article source: https://www.huffingtonpost.co.uk/entry/biff-method-narcissists_uk_696f868de4b03601d1a63e9e