Is it even legal?

[boatie_au]

I have sold a luxury bag via ebay and during the postage process I have measured only size of the bag box and weighted then issued an ebay postage label. After arriving the post office, I have purchased a post office box to further protect the parcel. So the pracel box postage price was $23 and buyer received the item all good happy days.

But over a month later I have been issued with a huge $129 fee for "postage adjustment fees" since the actual postage dimension was slightly bigger (less weight). I just can't figure this out on top of my head how could this even happy, could this be prevented via posting stage I would happy to add bit extra fees to cover extra size of the parcel at the site but not getting hit by this huge totally unexpected bill after a month later. 

Not sure what they doing to protect the seller's rights seems non 

[love_of_cars]

I assume it's Australia Post.

Get onto their website and start a support chat.  State the tracking number and size / weight of the parcel and get them to look it up and explain to you what happened with the fee.  It may well be an error and you can get refunded.  The worst that will happen is they will point out where you went wrong and you can learn from it.

[gutterpunkz05]

Yes, charges for underpaid postage are legal and penalty payments may be applied on top of the postage recovery.   $129 seems excessive unless your measurements were well understated.  Contact  ebay CS to question the charge.

[boatie_au]

it is just a bag box with less than 2kg, not sure how they managed to work out with over $100 postage fee, eBay costumer service just ask me to push the ball to post office completely useless

[siddieswans]

Trying to help here. You purchased an eBay postage label based on the size and weight of the original box. You then bought another larger box and presumably used the original postage label? Of course the new weight and size is going to be more, so naturally the cubic weight (over 1 kg) postage cost  is going to cost more than the original label you purchased. If the eBay label was for Australia Post love_of_cars has given good advice about how to find out why the postage adjustment fee was so large. If it is eBay courier I have no idea. 

[gutterpunkz05]

If it is over 1kg and you are not using flat rate packaging, then cubic weight applies, and is calculated from the exact parcel measurements,  H W D all taken at the widest point.

[boatie_au]

got that, I made a mistake back to then, but I was just a casual seller how would I possible know the additional fee would be that much?  My point was there should be a pre-warning process to pay off additional weight in advance as when I purchased the postage label I did all measurements at home and I would simply get rid of the box if that was the case.

[davewil1964]

Any seller, casual or not, should be across what postage costs are and how they are calculated.

[gutterpunkz05]

Hi there,  ebay issues a label based on the information you declare, they have no idea that additional charges have been applied by AP, until they are billed accordingly and then they will recover any outstanding postage and penalties from you.

Australia Post had a major clamp down on underpaid postage, and items now pass through automated  weight and measure devices whilst in transit.  Note this system is not foolproof, but unless you can prove otherwise you have little chance of having the charges reversed.

[sandypebbles]

I'm not sure I follow the how would you possibly know part?

You know what information you put in eBay for the label

You know you then went and sent the item, in a larger box

Amount of the fee aside (which, yes I agree is pretty out there) you did know that the size of what you ended up posting was not what you 'told' eBay you were posting