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# Common import errors

If your customer import fails or data doesn’t appear correctly, it’s usually due to formatting issues in the CSV file. Below are the most common things to check.

### Required columns
* Your file must include **email** and **points**
* Do **not** capitalize column names (for example: `Email`, `Points` are invalid)
### Points value issues
* Points must be a **positive number**
* Points cannot be `0` or less than `0`
### Email format issues
Email addresses must be in a valid format (for example, `name@example.com`) and use a valid domain (such as `.com`, `.net`, `.co`).
Remove invalid characters from email addresses, including:
* Spaces
* Commas (`,`) and semicolons (`;`)
* Quotation marks (`"` , `'`)
* Angle brackets (`<`, `>`)
* Slashes (`/`, `` )
* Other unsupported symbols
### File formatting tips
* Make sure your file follows the same structure as the sample CSV
* Each row should represent one customer
You can refer to the full import guide here: [Importing loyalty data from another loyalty program](https://docs.bloy.io/en/article/importing-loyalty-data-from-another-loyalty-program-1ayignd/#3-how-to-import)
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If your store has a large dataset or you’d like help reviewing and importing your file, feel free to contact us via in-app Live Chat or at [support@bloy.io]().