My younger sister offered us a fridge that she could not fit in the kitchen of her house. It was bigger than our current one so we said we'd have it. Our mother had bought it for her. She charged us £100 for it. We discovered it was covered in dents where her boyfriend used to punch it.
Approximately 18 months later, we moved abroad but left various items in a storage facility, already being rented by my mother long term, as we had not decided whether we would be coming back. There were some quite new expensive bookcases and matching sideboard, a newish large TV, the fridge, washing machine, and dishwasher and a few smaller items.
We came back a year later with nothing but suitcases and discovered my sister had had the lot of it, including the fridge we'd paid her for! The bookcases and sideboard had been smashed up by said boyfriend.
My mother gave us a small TV which did not actually work, which we discovered after we'd carted it across country 800 miles, and insisted that it was ours as it was the one in the storage unit. Sister said she had not seen any TV in the storage unit. We visited her house around a year later and saw there, in pride of place in the lounge 
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Before we left to move abroad, we'd left DH's car with her as she'd told us she'd found someone to buy it. She'd send the money on later, she said. Did we see it? Did we hell!
Another sister - we offered her our 2 year old 3 seater sofas (2 of them) as we decided to get leather ones as we needed something wipe clean with toddler twins! They were in very good condition (washable covers + a spare set) and had cost around £1500 altogether. She really needed them as her's were falling to bits. Her husband borrowed a work colleagues van to transport them. She later told me I should have paid her to take them as it would have cost us money if we were to hire a van to dispose of them, and she was serious!