• More of a legal requirement really. Provided the seller states in writing that they'll reimburse return postage costs (which they do in their Ts&Cs) they're not obliged to provide a pre-paid return label or collect the goods.
    In my case, I prioritised getting my 90 quid back for the seat post over and above the postage. Luckily, their system, presumably automated, was fairly swift to refund for the item.

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