The local courier service singapore would make couple of delivery attempts initially. In case, you were unable to collect the delivery due to non-availability, the courier service would make the third and subsequent delivery attempt that would be chargeable per consignment. It would be based on the weight of the consignment as well.
However, it would be pertinent to mention here that any collection or delivery to be made out of Singapore would be charged per collection or delivery. It would entail additional charge that would be applicable to or from the remote locations in the Singapore region that have been far and beyond any standard locations serviced by the company.