My opinion
In my opinion I wouldn't say it's fraudulent, but if you all you are doing is just rebilling all your unpaid claims every month, you are not doing anything for your AR. I understand rebilling everything that is 60+ days out right now, so you can get any timely filing denials, duplicate denials, etc. to work and get off your AR.
I also understand rebilling your 61-90 days claims monthly if you have not been paid or have not received a denial, so you can get that claim on file with the insurance and stay with-in your timely filing limit.
If you are constantly dealing with insurances not having your claims on file maybe there is something wrong with your electronic claims and/or your clearing house.
The first thing I would do is, rebill everything 60+ days out, then start calling on EVERYTHING that is 120 days and over then move to your more current claims!!! If you just rebill everything you are going to end up with alot of 'duplicate' denials and essentially be in the same place you are in now.
My office is working hard on our AR as well, since its gotten a little out of hand, the best thing we have done is simply to call on each one. You will be surprised on the outcomes there will be.
Hope this helps!
ChicaD