Desperate to make payment?

Normally when any one owes you money,  you have to follow up with the person regularly to make payment.  But I encountered a strange case where a particular company Y*** is desperate to send a cheque to me  and then ensure that I encash it. This is a Delhi based company with  UK ownership.

They had sent a cheque  in July and were following up continuously to check if I had encashed it.  Now again I received an email saying that I had requested the cheque and they were unable to provide any valid proof that I had really requested the cheque.  Are they trying to frame me and why ?