20% Overpayment?

[pumpkinsoup]

Hi

Im speaking with a vendor who is charging an extra 20% on the total cost price of my order. They are wanting to do this in case my order would be stopped by customs and they would re-ship it.

I asked if my order comes through the first time will they refund the 20%, they say "no".

Is this normal?

Thanks

 

[WinterFarce]

Never heard of this