In addition to many other issues, I would never agree to pay import duties and taxes out of pocket as a courier. Either you give me the cash to pay for it or I'd tell customs to keep the parcel and let the buyer sort it out.
Now, even assuming I'd be as silly as to pay duties and taxes out of pocket, I sure as hell wouldn't hand over a parcel before being paid in full for my services and any and all taxes and duties.
Now, even assuming I'd be as silly as to pay duties and taxes out of pocket, I sure as hell wouldn't hand over a parcel before being paid in full for my services and any and all taxes and duties.