My large employer uses an automated payroll service that direct-deposits. I've had no problems for 11 years. This week, instead of getting my usual deposit of about $1500, I was paid only $800. Nobody - neither my supervisor, director, on-site HR rep, nor the payroll service, provided an explanation, and no system wide errors were reported. Can an error of this magnitude and singularity be attributable to a computer glitch? Or is it a sign of human intervention? I am concerned because I am recovering from a multiple sclerosis relapse. I filed for FMLA leave, am now back full time, and have been told by my direct supervisor that I have time to get my production back up. However, I suspect the on-site HR rep wants me out.
A couple thoughts, on both sides of the equation:
If you have reason to believe that the HR rep is not acting in a way that complies with HR policy and the laws regarding medical leave, then you should seriously considering talking to a secondary channel - either another person in HR, the HR rep's boss, or an out of band complaint line, or even the company's legal department or your own lawyer (there are often state provided consulting attorneys for this... but it depends on where you live).
But you want more than just an issue with a paystub, you want a history of improper interactions - because computers really can make mistakes.
If this is the first week you have returned to fulltime, the most likely scenario is that the return date was mistyped. Or it could be your error if you are paid biweekly and returned in the middle of a pay period. Sometimes people don't realize the exact pay period dates do not always track with the day you get paid but rather with a week or even two weeks earlier.
What you need to do is get the paystub for the incorrect pay and one for a pay period in which you got the correct pay and highlight the differences. Then take the highlighed pay stubs to HR and ask politely for an explanantion as to what happened. Specifically ask what date they had you returning on (correct it if it is wrong and get the proof of that either from timesheets or from a written confirmation from your boss of the date you returned to work) and what dates the pay check covered.
Treat the whole thing as a problem to be resolved, not a massive insulting screwup that you are furious about. You will catch more flies with honey than vinegar. If you can approach it from the perspective of "I was expceting this and the pay check was this, did I do something wrong in getting my pay re-started?", you will likely have more cooperation than if you go in and accuse HR of trying to get rid of you. .