This message will appear when your code cannot be found on Cambridge One.

Here are some possible reasons and how to fix them:

• You entered the wrong code

• You are using a code from another platform

• The code is from the closed Cambridge LMS platform

• The code is from the closed Bookshelf platform

• You are using a class key instead of an activation code

• The book may not be original

You entered the wrong code

Sometimes the code is entered with mistakes. Check these tips:

• Make sure all letters and numbers are correct. Our codes never use the number 0 or the letter O. If you see a similar character, use the letter Q.
• Enter the code without dashes.

Check the code carefully and try again. 

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You are using a code from another platform

Some codes are for other Cambridge sites (like Cambridge Go, e-Source, Bookshelf, LMS, etc.)

Check the URL indicated below your activation code. It will always direct you to the platform where your code must be activated.

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The code is from the closed Cambridge LMS platform

If the URL below your code is www.cambridgelms.org, please fill out this form and include:

• A photo of the activation code printed on the book or card

• A photo of the ISBN printed on the book (the number on the back cover, below the barcode that starts with 978)

• Your location/country

• Your role (Independent student or part of a school)

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The code is from the closed Bookshelf platform

If the URL below your code is www.bookshelf.cambridge.org, please fill out this form and include:

• A photo of the activation code printed on the book or card

• A photo of the ISBN printed on the book (the number on the back cover, below the barcode that starts with 978)

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You are using a class key instead of an activation code

A class key does not give access to learner resources. It has 8 characters and has both lower and upper case letters and numbers.

Example: aBC1-de2F

Make sure you are entering the activation code when asked to activate your materials. For more information, read: What is the difference between an activation code and a class key? 

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The book may not be original

If you bought your book from an unofficial seller, it may not be a real Cambridge book. 
Some books may have fake or copied codes, which will not work.

Please get in touch with the seller, they might provide a refund or replacement. 

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