Dear paras kumar,
You will get a Settlement Letter from the Bank after paying the settlement amount in full to the bank. Such Settlement letter will also include details on NO FURTHER DUES and closure of your loa account. That will suffice your purpose.
Morever, you can also ask for a Closing account statement of the Loan account for your future reference, as an additional cushion.
About CIBIL score, The reporting to CIBIL is quaterly on all credit issues. And here your name would appear a Delinquesnt customer, which will affect your CIBIL Score and this might create apprehensions in your credit applications in future.,