You can prevent duplicate entries in Excel by applying a custom Data Validation rule to limit the number of times a word or number is repeated in your spreadsheet.

In this Excel tutorial, we'll go over how to create a custom Data Validation rule to prevent duplicate entries in a column.

You'll see how to set the limit to an entry so that it can appear only one time, twice, or however many times you want to set your entry limit to.

To walk through how to create a custom error message using Data Validation, make sure to take a look at this article: yacostasolutions.com/data-validation-error-messages/

Click here if you would like to read our step-by-step article on this: yacostasolutions.com/prevent-duplicate-entries-in-excel/

And make sure to get your FREE pdf list of favorite Excel keyboard shortcuts: yacostasolutions.com/newsletter/

*FYI:
This tutorial was created using the desktop version of Excel in Microsoft 365. You can upgrade to this version here: yacostasolutions.com/MS365

The screen recording + editing was done using Techsmith Camtasia. You can check it out here: yacostasolutions.com/camtasia

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