Please never share confidential information like OTP number/ login password when you receive any unsolicited calls/ SMS/ e-mail/ IVR with anyone as Sundaram Finance Limited or its employees will never ask these details. Click here for August 2026 Large Defaulters List. Click here for Wilful Defaulters. Click here for Public Notice on Wilful Defaulters.   Centralised calls with the prefix - 1600 - from our company are official and safe: 1600 11 3974 | 1600 11 3975 | 1600 11 3986 | 1600 11 3389 | 1600 11 3480. Effective 05-Oct-2026, payments made through local cheques will be credited to your loan/fuel finance account only after the cheque is successfully cleared by the bank.