What other CSV import errors should FileValidator detect?

Hi everyone

I'm the maker of FileValidator, a tool that helps clean CSV and Excel files before importing them into tools like HubSpot, Salesforce, or Airtable.

It already detects and fixes common issues such as:

• Invalid emails

• Wrong date formats

• Text in numeric columns

• Missing values

• Numeric formatting problems

• Uppercase emails

• Duplicate detection

You can also auto-fix many of these issues and export a cleaned CSV.

I'm currently thinking about adding more types of validation and would love feedback from people who regularly import data.

What CSV import errors do you run into most often?

Examples could be:

• column naming issues

• phone number formats

• encoding problems

• duplicates

• required fields

• CRM-specific formatting

Any suggestions would be really helpful