> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://doc.common-services.com/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# Skipped Product: The reference is incorrect - Amazon Marketplace Plus

The export log displays the following message:

||| Skipped Product: 1/0 The reference "XXX-YYY" is incorrect

## Cause

The product reference contains one or more characters that are not accepted by Amazon.

### Amazon reference requirements:

* Only displayable ASCII characters
* Maximum length: 40 characters
* **No spaces at the beginning or end of the string**

This issue is most often caused by an extra space at the beginning or end of the reference.

## Solution

Use the [Import and Export Tool](https://doc.common-services.com/en/article/product-references-and-eanupc-codes-importexport-tool-amazon-marketplace-plus-1flimr0/) to clean and correct your product references.
