I've also heard as Dan noted, of problems with UPS in the States, but that seems to differ, State to State as some have shooters working in them, while others have non-shooters. Here, it is with any shipment - any product, doesn't matter.
Friend of mine - well, not really a friend - aquaintance - received a bill from UPS Canada for brokerage fees to get his Marlin into Canada from California - bill was over $1,000.00. He called and they said it was in their warehous in town here and they would not release it until the bill was paid. They also said they had personally handled it in town here when it arrived. He asked them how they got their hands on the bill of lading. They said they'd brought it to Prince George and passed it through Customs here.
The Marlin had already been mounted on his wall for over a month. He flew to Vancouver and brought it through customs himself as it was air-mailed to himself to a friend's address there. Soon as he got the call, he flew there to get it, which actually happened.
UPS Canada is an insidious outfit. Mail only- even for oversize, over weight items. Pay the extra postage - it's cheaper than UPS Canada getting their hands on it.