A friend of mine resides in Singapore. Can his resident address be used as a registered address?

My friend stays in Singapore. Can I use address of my friend for my company registered address?

Yes, you may. This would come with a list of regulations. You can use your friend's address as long as it is approved under the Home Office Scheme with URA or HDB. There are lots of rules and criteria to be met. If those conditions are breached, your permit can be revoked. You must not cause any amenity problem to the neighbors. You may also lose privacy as your information is publicly available.