Every state has a different mode of payment for application fee. Generally, you can deposit your application fee via:
-In person by paying cash [remember to take your receipt]
-Indian Postal Order
-Money orders (only in some states)
-Affixing Court fee Stamp (only in some states)
-Banker’s cheque Some state governments have some "head of account".
You are required to deposit fee in that account. For that, you can either go to any branch of SBI and deposit cash in that account and attach deposit receipt with your RTI application or you can also send a postal order or a DD drawn in favor of that account along with your RTI application. Please see respective state rules.