@Kevin: Common sense is that a huge Star Wars fan might not be happy with a 4,000 pieces Lego "Death Star" because it means weeks of work. Common sense is that a huge Star Wars + Lego fan might not be happy at all receiving
a second 4,000 pieces Lego "Death Star". In the UK, a gift receipt would be absolutely normal and expected except for gifts that are consumables or that were bought with 100% agreement of giver and recipient. And even in the last case, I'll add a gift receipt just in case I got it wrong (like buying the 2007 Death Star instead of the 2015 Death Star). —
gnasher729 36 secs ago