When and who
Cancel within one week of closing the business; closing on 3 February means cancel by 10 February. The holder, company representative or EA can cancel immediately. PR conversion or expiry needs no cancellation, but an expired holder remaining in Singapore must obtain lawful stay.
Tax, family and temporary stay
Fulfil tax obligations and seek IRAS clearance at least a month before closure. Cancellation also ends related family passes, without reinstatement. Use EP eService on myMOM; if remaining in Singapore request STVP through it, up to 90 days from application. Receive it by email and show it with valid passport on exit. Cut and discard the pass card.
Official source
Written independently from official MOM source material.