I purchased a small item from a NZ business earlier this year. Paid by Paypal. I asked for the package to be sent to my work address. Turns out the person who sent the item used normal post, squeezing my item into a normal envelope. I didn't realise they would send the item in an envelope, otherwise I would've selected my home address. I don't think I've received anything via normal post in a decade - aside from voting papers.

Anyway, the item didn't arrive. The reason could be mailing to a commercial address with a PO BOX. Or could have just gone missing... or ... well, the options are endless. I don't know, nor do I care to be honest. I just wanted the item I paid for. I let the vendor know and they mailed out the item again to my home address and it arrived.

All good I thought, until today. A month or so after I thought the purchase was all sorted, the vendor has emailed me with an invoice for the first item that went missing in the mail. They want me to pay twice for the one item I have received.

Is this something I am liable to pay for?