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"fill out" vs "Fill in"

Both 'fill out' and 'fill in' are correct phrasal verbs used to describe completing a form or document. The choice between them depends on regional preferences or personal style, but they can be used interchangeably in most cases.

Last Updated: March 31, 2024

fill out

This phrase is correct and commonly used in English.

This phrase is used when completing a form, document, or questionnaire by providing the necessary information in the blank spaces provided.

Examples:

  • Please fill out this application form with your personal details.
  • Don't forget to fill out the survey after your visit.
  • You need to fill out all the required fields before submitting the form.
  • Could you fill out this feedback form for us?
  • Students must fill out the registration form before the deadline.

Alternatives:

  • complete
  • fill in
  • answer
  • provide information for
  • write in

Fill in

This phrase is correct and commonly used in English.

This phrase is used interchangeably with 'fill out' when referring to completing a form, document, or questionnaire by adding the necessary information in the spaces provided.

Examples:

  • Please fill in your name and address on the form.
  • Could you fill in the missing details on this document?
  • Don't forget to fill in the required fields before submitting the form.
  • You need to fill in all the blanks with the correct information.
  • Students are required to fill in the registration form online.

Alternatives:

  • complete
  • fill out
  • answer
  • provide information for
  • write in

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