Wolfgang Amadeus Mozart's spurious and doubtful works are the works indicated as such in the latest version of the Köchel catalogue, or in any previous version, apart from those compositions that are moved to the main catalogue in its most recent version.

Can also be included in this category:

• Works for which there has been a persistent attribution to Mozart, traceable in other reliable sources, without any mentioning in any version of the Köchel catalogue
• Works previously in the main catalogue, no longer mentioned in the latest version of the catalogue
• Compositions not removed from the main catalogue in its latest version, but with reliable sources doubting or disproving the attribution to Mozart

Not to be included in this category:

• Works listed in the Köchel catalogue or its Anhang where there never has been any unclarity about the attribution, either in the catalogue or elsewhere, e.g. K. 572