Alliance Data Systems Corporation announced that it will pay up to $3.7 million to former CEO Melisa Miller under terms of a separation agreement. Miller stepped down in November but remains an employee in an advisory role through Feb. 16, when she's to be replaced by incoming CEO Ralph Andretta. He had been managing director of the U.S. credit cards business at Citigroup. The severance package calls for Miller to earn two times her base salary, or $1.65 million, paid in regular pay periods through November 2021, according to the agreement filed with the Securities and Exchange Commission. There are also cash payments of $500,000 before March 20 and $1.55 million in August - providing she meets terms of the deal, including prepping for her successor. Miller had been promoted to CEO just five months before her abrupt resignation. The board had planned to hire Andretta as COO to be her eventual successor, but decided to make the switch instantly.