You should avoid off market transactions

i. What is an off market transaction:
Off Market transaction is one which is settled directly between two parties with or without using the broker and where no Clearing Corporation / Clearing House is involved.

ii. Off-market transactions fall outside the jurisdiction of the Exchange:
Off-market transactions are illegal and fall outside the jurisdiction of the Exchange and thus should be ignored.

iii. Huge risk of default:
One should avoid off-market transactions as there is a huge risk of default due to non-involvement of stock exchange.