handed in is not in our dictionary (yet). Here's what it could mean:

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phrasal verb

To submit or deliver something, such as an assignment, a resignation, or a found item, to a person or place of authority.

Examples are provided to illustrate usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Last week, the NUS handed in a petition signed by 13,000 students calling on the government to backtrack.

From BBC • Apr. 20, 2026

On Tuesday, des Cars handed in her resignation to President Emmanuel Macron, which was accepted.

From Barron's • Feb. 25, 2026