Mandatory usage of 'without prejudice' in legal notice

It is not a mandatory requirement to mention 'without prejudice ' in the statutory legal notice.

It may be written as an abundant precaution under section 23 of Indian Evidence Act.

The “without prejudice” principle means statements made in a document marked “without prejudice” or made verbally on a “without prejudice” basis, in a genuine attempt to settle the dispute, will generally not be admissible in court as evidence against the person making the statement.