Negative 401(k) payroll contribution

[justasking]

The payroll system we use is a monster Payroll accidently sent a 401(k) negative contribution for someone that has never even been a participant in the plan. In our group we consider that an invalid record and it is deleted from the 401(k) records. However, I am considered about a negative showing up on their W2. If they were to send a positive amount to correct it for that person, then that person would have funds sent over to the 401(k) plan. Anhyone ever seen this before?

[Lou S.]

Sounds like a question for the payroll IT department on how they will be generating W-2s.