This forum is to discuss different features/issues of Oracle Financials modules ( GL - General Ledger, AP - Accounts Payable, AR - Accounts Receivable, FA - Fixed Assets & CM - Cash Management ).
I will give some scenario, In INDIA if you take the case of Bank of saurashtra has now merged with State Bank of India and Centurion bank of punjab(CBoP) has now merged wit HDFC Bank.
Assume that I am maintaining two bank account 1. Bank of saurashtra and 2. State Bank of India...
My opinion is that disable the 2 bank accounts by add the end date for this bank account then define a new bank account with new name & make this bank account the default bank account for you to keep the old history & data.