DIFFERENCE BETWEEN WRITTEN OFF & WRITTEN BACK:
WRITTEN BACK:- IT MEANS TO TAKE REVERSE THE EXCESS PROVISION MADE.
FOR EXAMPLE IF YOU MAKE A PROVISION FOR SUNDRY CREDITORS AND AFTER MAKE ALL ACCOUNTING ENTRIES THE PROVISION FOR CREDITOR A/C REMAINING BALANCE THEN YOU CAN MAKE A REVERSE ENTRY OF THIS BALANCE AMOUNT AND IT MAY IMPACT REVERSE OF THE PREVIOUS ENTRY IN P/L A/C.
WRITTEN OFF: IT MEANS THAT YOU HAVE A BALANCE IN YOUR BOOKS AND IT MAY NOT POSSIBLE TO REALIZED IN FUTURE.
TO CLEAR THE BALANCE IN THE BOOKS OF ACCOUNT THESE TYPE OF AMOUNT CAN BE WRITE OFF.
I THINK NOW IT IS CLEAR THAT ONE IS USED FOR ADJUST THE EXCESS PROVISION AND OTHER IS USED FOR UNREALISED AMOUNT.
REGARDS
RAJESH