I recently left a company a couple weeks ago on the 10th of March. I did everything properly - submitted a letter of resignation, gave them more than two weeks notice, had my exit interviews and filled out all the necessary paperwork. I started my new job that next Monday the 13th and when the fifteenth rolled around I got two checks, which I expected, one from my new job and the other being my last check from my old job (or so I thought). Despite my last day being the 10th the check from the old job was for the normal full amount I would receive working a full two week pay period 1st-15th. I thought that was interesting but maybe it was luck and figured I’ll take the couple extra bucks as a parting gift. Then as of today, which is payday for me, I look at my bank account to make sure everything was set up and worked properly regarding my direct deposit information, and what not, but when I opened up my account I saw a large increase from my previous balance. It turned out that my old company is still paying me my full pay period compensation as if I was still working there the past two weeks. Am I liable to return the money to them if I don’t say anything? Please let me know what implications I’d be facing by not doing anything about it.