What is a requirement for a demand letter in terms of notification?

A demand letter serves as a formal notification to an individual or entity regarding a specific obligation or debt that needs to be addressed. For a demand letter to be considered effective, it must stipulate a timeframe in which the recipient must act or respond. In the context of this question, the requirement that the letter must be valid for at least 15 days establishes a clear period during which the recipient is expected to respond or take action. This timeframe is critical, as it ensures that the recipient has adequate notice and opportunity to comply with the demands outlined in the letter without being rushed or caught unaware.

The stipulation of a 15-day validity allows for a reasonable period in which the parties can communicate or rectify the issue at hand, fostering effective resolution while adhering to legal expectations.