Any chance you open this service to all with a fee of course. Would that attract queries from authority if too many seem to have same residential address as yours?
Already i am a post box as it is but my mailbox services are free, perpetually to my friends. I have posted some links, hope that it helps with your queries.
Source:
http://www.eld.gov.sg/pdf/local contact address(2011).pdf#zoom=100
What is a local contact address?
A local contact address is a residential address in
Singapore that you register with the ICA for voting
purpose.
The local contact address must be either :
(a) the address of any residential property in Singapore
which you still own an estate or interest in; or
(b) the residential address in Singapore of:
• your spouse, grandparent, parent, sibling, child,
grandchild;
• any grandparent, parent or sibling of your spouse;
• any sibling of any of your parents or your spouse s
parents;
• any child of any of your siblings or your spouse s
siblings.