Andrew, if its parcelfarce, then they send you through a letter, bit liek your new pin number for a credit card. You can then go online & pay with your card, they dispatch it the next day after payment normally.
I had a big problem with DHL recently, they deliver the goods then send an invoice. But I got wise to this & researched the Bill of Exchange act & asked DHL for the opriginal customs invoice...which they refused to supply. they proomptly handed me over to a credit company who added £40 on top & wanted £138.99! I sent them a letter asking for the original customs invoice as is my right ( I mean who pays a bill without the original being in their possesion?). these credit people replied saying they were NOT going to pay my charges of £250 per letter or phone call or even my £5000 per day or part thereof for any court appearance...so I refused to pay their £40 admin charges...nothing heard since!
If you know how to play the game, you can get things duty free.....especially if the custoims sticker on your parcel has "Samples" on it
Ross