"Intentional Interference" (Legal), also known as Tortious Interference. When a person intentionally damages someone's business, employment or education causing economic harm. (fake phone calls, cancelling agreements or appointments).
e.g. Using blackmail or extortion to induce a contractor to break a contract or obstruct the ability to honour a contract, deliberately refusing to deliver necessary goods.
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Wikipedia, Retrieved August 21, 2018 https://en.wikipedia.org/wiki/Tortious_interferenc...