Were you redeeming at Tether, or were you redeeming at Bitfinex and they were selling the Tether on the open market to someone else and sending you the proceeds

Were you redeeming at Tether, or were you redeeming at Bitfinex and they were selling the Tether on the open market to someone else and sending you the proceeds? I think what the OP is saying is that there is not a reliable account of someone going to Tether with 100k USDT and having Tether give them $100k USD.