The Extension Letter is a crucial document used in Hong Kong business practice when parties wish to extend their contractual relationship beyond the original term. It serves as a more streamlined alternative to drafting a completely new agreement or an amendment and restatement. This document type is particularly useful when the primary modification is the extension of time, though it can also accommodate limited additional changes to the original agreement. The Extension Letter must comply with Hong Kong contract law requirements and typically includes references to the original agreement, specific details of the extension period, and confirmation of continuing terms. It's commonly used across various sectors for extending employment contracts, lease agreements, service agreements, and other commercial arrangements where the fundamental relationship remains unchanged but requires continuation beyond the initially agreed term.

1. Letter Header and Date: Formal business letter header including sender's details, recipient's details, and date

2. Reference to Original Agreement: Clear identification of the original agreement including its date, parties, and subject matter

3. Extension Terms: Specific details of the extension including new termination date and any modified terms

4. Confirmation of Other Terms: Statement confirming all other terms of the original agreement remain unchanged

5. Execution Block: Signature blocks for all parties, including space for date of signing