At the time I thought this was great news. The old postcode, 2171, was sorted and centered at Narrellen, about 40 minutes drive South West of here. As a result, whenever we entered our postcode on a website we got very strange results... sometimes we were told we were out of the delivery area for an internet site because we are "outside metropolitan Sydney". Sometimes we were told "we don't deliver that far away" by a company 2 minutes drive down the road that delivered Sydney-wide. Also, when entering our postcode to find "your nearest store" for just about anything we were given a store an hour's drive away! It seems many computer systems treat postcode like American zipcodes which cover a much smaller area.
However, the change of postcodes has been a disaster, and not Australia Post's problem. Australia Post publishes updated data monthly on their website in a nice, easy to use, consistent, database format. Does anyone ever download it for updates... NO! Now when we look up our "nearest store" we are informed that we entered an invalid postcode... and I should "check your postcode and try again". I had half a mind to set up a shell script that alternately looked up (on Aus Post website) the postcode for Voyager Point, and submitted it to the "nearest store" lookup... and repeat this every minute forever until they changed their tune! It would only be following their instructions after all!!! When I tried to renew my driver's license, by law I must make sure that my address is correct. They wouldn't accept my correct address due to the postcode "not existing". Technically they couldn't renew my license or the licenses for the other 1000 people affected by this change ... but at least a human let me use my old, incorrect postcode and renew my license. I even contacted one internet site about this only to be told (apologetically) that they couldn't make the change without a total rewrite of their software (for database integrity).
The worst was today. Now 2 years after the change. Someone in the US needed to send me a parcel via a very popular international courier service. It was rejected as "Voyager Point, 2172" does not exist! This took 6 hours and a few phone calls to sort out.
I just wish these software vendors didn't hardcode the postcodes in. How hard is it to automatically download the new data from AusPost... or at least after manual checking of detected changes? How hard is it for the software to not just blindly say "you are wrong, fix it" but instead offer the possibility that it is out of date.