<prompt> Human: Like a good little saver, I was maxing my 401k during 2015. I was contributing 1500month, while my employer matched a paltry 60month but hey, free money. I left the company for a better job in March 2016, and have been working to rollover the funds to my new employers 401k.As I was reviewing the statements for my old 401k, I noticed an egregious error to my benefit. Somehow, the February employer match was credited at 3300! My best guess is that it was a typo, but in the three months since it was applied, I havent been notified, and the entry has not been altered. Im under the impression the company has no clue, and my moral compass shows a strong heading towards not a chance I would tell them.At this point the old 401k has been terminated, and the check is in the mail ready to be deposited to my new plan. My concern is that someday this mistake will be realized, and the old company will come around asking for their money back. My rational mind says this is unlikely, but my emotional side thinks theres gotta be a catch. Did I really just get handed an extra 3k? Should I be concerned?Assistant: Due to the multiple layers of regulation on 401K plans it is highly unlikely that a mistake like this was made and then missed.Does the plan have a profit sharing component? Sometimes those contributions appear in the early months of the yearHuman: This seems to be the most likely situation, short of an outright mistake, but I asked about profit sharing during my initial interview, and they said didnt have it. It also didnt occur in the past 2 years, so I would expect that our management would have told us. It was a small company struggling for business, they would have been quick to tell their employees that they were able to provide such a bonus.  <response>: There are also cases where an employer has incorrectly contributed too little, and at the end of the year the plan oversight personnel will go back and check everything and sometimes the employer owes you more than they contributed originally. 