The old 500g and 3kg parcel post satchels are becoming phased out for the new Red, White and Blue Parcel Post Plus satchels.
They are quite handy for flat rate postage and come in three sizes; 500g, 3kg and a massive 5kg. The 5kg satchel is very big and can fit large boxed items within the satchel.
Each one of the parcel post satchels comes with a tracking number, which means that the parcel can be tracked from lodgment to delivery.
To ensure that your customers get the full tracking experience, it is important to have the Tracking barcode scanned at a postal outlet upon lodgment. The counter staff must scan the items tracking barcode and provide you with a docket proving lodgment. At the same time the lodgment tracking event must be shown on the Australia Post tracking website.
According to the Australia Post website, counter staff must scan the tracking number on lodgment and you should receive a tracking event on lodgment - minimum. If the counter staff refuse to scan the item, strongly encourage them to do so OR report the postal outlet to Australia Post, using the "Contact Us" feature on their website. Avoid lodging the article in a red post box, as you will only receive a tracking scan when the items is in the destinations postal warehouse (if at all), which may be days away.
Always include the tracking number in correspondence to your customer though My Ebay - Selling/Sold - Sold - Item - More Actions - Add Tracking Number
With proof of lodgment both the seller and the customer become aware of the actual time taken for the item to be delivered and you both have proof of when/where the item was sent.