The time it takes to respond to a letter of demand depends on various variables, including the intricacy of the dispute, the parties involved, and the situation's urgency. Generally, providing a reasonable timeframe within which the recipient should respond and comply with your demands is advisable. This timeframe can be specified in the letter, typically 14 to 30 days.
However, it is essential to note that there is no fixed deadline or other legally binding deadline or mandated response time for a letter of demand in Singapore. It is ultimately up to the recipient to determine how they will handle the situation and respond to the letter. Further legal action may be considered if the receiver does not react within the stated date.