Mvat refund claim

Don (ve) (24 Points)

08 July 2014  

Hi I have an business in which I Charge  Service Tax on invoices
& Some materia I sold i.e CD on which I put MVAT

My query is that, MVAT Sale is avery rare i.e 1 invoice in every 100 invoices
but I have so many bills on which MVAT input I took & claim refund every month

Is there any law regarding not to claim refund