box number 
noun
A number identifying a private advertisement in a newspaper and functioning as an address for replies.He was critical of people who often leave their weapons within their vehicles and added that anybody selling a firearm through a newspaper should only use a box number and never include their address or telephone number in the advert....
- They just leave their personals box number for you.
- The man's personal e-mail ID and the box number in which to apply followed.
- auto cook
- autocoprophagous
- autocorrect
- auto-correction
- autocorrelate
- autocorrelated
- autocorrelation
- autocorrelation function
- autocorrelator
- autocorrelogram
- autocoup
- auto court
- autocovariance
- autocovariance function
- autocracy
- autocrat
- autocratic
- autocratical
- autocratically
- autocratism
- autocrator
- autocratoric
- autocratrix
- autocrime
- autocrine