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Rule out the usual hiding places first. If the piece really is gone, check the set piece by piece and leave with the element ID LEGO asks for, or a link to buy the part.
Checking
16 pieces in 16 part and color combinations.
Builders who report a missing piece often find it in one of these places. Tick each one off as you look.
LEGO's request form asks for the set number (DOTS-HP-2) and each piece's element ID, both listed above.
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Tile 1 x 1 with 3 Gold Quidditch Hoops, Bright Light Blue Background Print
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Tile 1 x 1 with Albus Dumbledore Print
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Tile 1 x 1 with Black Hogwarts Silhouette, Gold Background Print
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Tile 1 x 1 with Chocolate Frog Card Print
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Tile 1 x 1 with Dobby the Elf Print
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Tile 1 x 1 with Envelope, Red Wax Seal, Black 'H' Print
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Tile 1 x 1 with Gold Chocolate Frog, Dark Purple Background Print
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Tile 1 x 1 with Gold Hourglass, Dark Purple Background Print
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Tile 1 x 1 with Gold Key, White Wings, Bright Light Blue Background Print
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Tile 1 x 1 with Gold Sorting Hat Print
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Tile 1 x 1 with Golden Snitch, Bright Light Blue Background Print
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Tile 1 x 1 with Minerva McGonagall Print
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Tile 1 x 1 with Rubeus Hagrid Print
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Tile 1 x 1 with Severus Snape Print
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Tile 1 x 1 with White Owl (Hedwig) Print
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Tile 1 x 1 with White Potion Flask, Dark Purple Background Print
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Tick each piece as you find it, or mark it missing.
LEGO takes requests for pieces missing from a new set through its customer service site. The form asks for the set number and each piece's element ID, the number printed beside the piece in the parts list at the back of the instructions. This checker lists both.
Request a replacement from LEGOMark a piece missing and your list links it to an eBay search for that part, which also covers pieces from older or second-hand sets.
Copy or download your missing list (the CSV opens in any spreadsheet), or print the whole checklist and tick pieces off on paper. Your marks stay in this browser, so you can check a big set over several sittings.
