Prevent errors from users entering the unique code incorrectly

This is really cool!

Can you suggest an easy way to prevent errors from users entering the unique code incorrectly (typos). For example, would it be possible to populate the input field for the unique code with a user's previous selection from a dropdown?

Currently it is not possible to prefill the input box of the Spreadsheet to Form widget by any other method. The user will have to fill in manually and provide the input data.

Example:

But do take note that the spreadsheet to form widget have the option that validate the correctness of the inputted data. So this will already check if the user inputted wrong value/code.

I hope this help. Let us know if you need further assistance.