Hi Junaid,
Adding my comments, you may review & add to your doc.

Period Close Checklist In Oracle Account Receivables

1. Complete manual payments and adjustments for the period (including cleanup of ‘Out of Balance’ batches)
2. Check and Complete final Receivables Interface from Order Management
3. Complete manual invoices, DEBIT Memos and credit memos
4. Run your final Auto Invoice process
5. Correct ALL Auto Invoice rejects and re-run
6. Clear all receipts from Cash Management
7. Apply receipts against Invoices and Debit Memos
8. Review the Unapplied Receipts Register
9. Reconcile receipts
10. Apply Credit memo to Debit Memo and Invoices
11. Approve or reject ALL Pending Adjustments
12. Complete or delete ALL ‘Incomplete’ invoices
13. Complete or delete ALL ‘Incomplete’ credit memos
14. Correct and post ALL open Lockbox batches (If Lock Box Implemented)
15. Print Dunning (Reminder) Letters (Optional)
16. Run Journal Entries Reports
17. Review Journal Entries reports for ‘unusual’ accounts and correct as needed
18. Run Period End Reports
19. Balance to the Aged Trial Balance
20. Post to the General Ledger using the period start date through the period end date – verify that ALL steps completed successfully.
21. Close the period – verify that there are no items in error
22. Open the next period and the next Future period
23. Post Journal Entries (In General Ledger)
24. Balance to the General Ledger (for the key accounts)

Regards
Aniruddha