Query (accounts)

If a party is our debtor as well as our creditor at the  point same time ( Eg A is our debtor for RS 200 and creditor for Rs 100)

then can we pass following setting off 

Bank - DR               100

A( as creditor ) - Dr 100

         To A( as debtor) -   200

If yes then is it voilating any accounting principal ? and for which amount is  consider for preparing receipt voucher RS 100 or RS 200?