The company used to give you a checklist to follow and 2 days "admin" days to complete it but in the abscence of this can I suggest this :
1. Contact HKIRD and get your tax sorted. You need a letter from CX.
2. Contact HK Immigration Dept to see what your status will be when you leave.
3. If required go the Central Police Station and apply for a "non-criminal record" cert.
4. Hand in all uniforms and paper manuals and get receipts.
5. Hand in CX ID and ICAO crew card. Get receipt.
6. Surrender all CX car passes.
7. Surender mailbox and locker keys.
8. Contact the salary section and get the date and final payout amount confirmed. Cancel all CX deduction authorities for staff travel etc etc .
9. Ask for all personal and training files to be deleted.
NEVER LOOK BACK
4.