Originally Posted by zombietooth

Which department at WHQ sent you the letter?

This happened to an acquaintance of mine. His letter was from "Fraud Prevention". They gave him an 800 number at WHQ, where he called to find out what was going on. They told him that he had been selling upgrade instruments on social media sites and that they were closing his account for violating the TOS. UA basically told him that they no longer wanted him as a customer and that he should take his business elsewhere. When he threatened legal action, they told him that they could no longer communicate directly with him but could only communicate through their lawyers.

He fought for about a year, filing complaints with every government agency he could think of, to no avail. He consulted a lawyer who advised him to save his money since the legal fees would exceed the value of the million plus miles that he lost, and that his chances of winning were low.

He was essentially banned for life from the FF program. While he can still buy tickets and fly on UA, he cannot earn miles.

You need to find out why they banned you, and if they have any evidence that might indicate that you were selling or trading your miles and/or upgrade instruments.

Good Luck.