your case on facts will be subjected to proofof those facts if that is accepted by court then you need not worry , cases are not uncommon that the unused cheques even without having a running account with the bank may have been be issued against value, you can also issue public notce or file first information report about the loss of signed cheques , but you say that no such cheque is in existance and further you dont have any knowedge as to who has stolen your cheques will be a big contradiction
your case appears to be imaginary .