What's the point of sending by registered mail?

I sent a bundle of documents via registered mail from the SAPO in Tyger Valley on the 8th December 2015.<br> <br> I am unable to track where the parcel is as their \GLOBAL"Track and Trace online system offers the following information:<br> \""No tracking information is available from UNITED KINGDOM\"".<br> <br> It is the 22nd of December"