Specifies whether or not to remove duplicate items from search results. When set to true, and there are duplicate items for an item in the search results, the subsequent duplicates will not appear in the results. Item listings are considered duplicates in the following conditions:
- Items are listed by the same seller
- Items have exactly the same item title
- Items have similar listing formats
- Auctions: Auction Items, Auction BIN items, Multi-Quantity Auctions, and Multi-Quantity Auctions BIN items
- Fixed Price: Fixed Price, Multi-quantity Fixed Price, Fixed Price with Best Offer, and Store Inventory Format items
- Classified Ads
For Auctions, items must also have the same price and number of bids to be considered duplicates.
Filtering of duplicate item listings is not supported on all sites. For GetProducts, this filter only works when IncludeItemArray is set to true.