While walking through the woods at the weekend, my wife slipped on a muddy track and fell. In the process, she bent the middle section of one of her poles (Black Diamond Women's Trail Trekking Pole).
Although she had no receipt or proof of purchase, she sent a photo of the bent pole to Black Diamond. Almost by return of post, she received a new pair of nearly complete poles (only the thinnest end sections were missing). So, in effect, she has a new pair of poles and enough spare sections to fix them if she bends them again...
Nice one, Black Diamond!