It is recommended that you make a photocopy of your passport and Identity Card before you leave home, so that you can be identified by these documents if you lose your passport. You are also advised to keep your Identity Card separately from your passport when travelling.
If your passport is lost/stolen and you need to return to Singapore urgently, you will need to do the following:
After your identity has been verified, the High Commission can issue you with a Document of Identity to enable you to return to Singapore. Upon your return, you will need to surrender the Document of Identity and apply for a replacement passport at Immigration & Checkpoints Authority.
Singapore citizens living in New Zealand can apply for a replacement passport through the Consular Section of the Singapore High Commission.