SA Post Office
Johannesburg mail international, parcel

I arrived at the auckland park post office today 14/01 /2013, to collect international parcel RE954114080US with local tracking RI269378248ZA, the teller handed the parcel over to me and i felt that there was nothing in there, I handed the parcel back to the teller and said open this, Conclusion the parcel was empty, Opened and re sealed, i find it hard to believe that a parcel tracked all the way from the US can just go missing, my question? Is customs involved in this, is it not safe to have parcels brought into the country, did somneone there like what they saw and decided to