Purchase Return or Debit Note

When to raise Debit note in books
The purchas party itselft makes eway bill and accepts damage goods on delivery challan base but doesnt provide credit note the same day as it take 2 3 month so when to file Debit note and how to clear mismatch of Ledger of party. what if i file debit note early but later our and their amount mismatch due to acceptable and non acceptable goods.