Instructions for Library Borrower ID

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NOTE! Material on this page refers to the original type of Cougar One Card. See this page for current borrower card information

  1. Search the CSU or I-Share Libraries’ catalog for your book or other item.
  2. Select the item.
  3. Check availability. If the item is available, click the REQUEST button at the top of the page.
  4. Carefully fill the Library Borrower ID field as follows:

    Enter 20411 plus your CSUID number from your card up to the sequence number.

    This will result in a 16 digit number, such as 2041198765432101

  5. Enter your last name (it is not case sensitive).
  6. Click the "Login" button.
  7. Follow the instructions to complete the request. You will have to enter your libprev.borrower ID number, i.e. 2041198765432101, again.


In the example above, the card carries a CSU ID number just below your name.

The parts of that CSU ID number you will use are

  • 987654321
  • 01

Make the Library Borrower ID as follows:

+ 98765432101

Keep this new number as your Library Borrower ID for use with the libprev. online public access catalog (OPAC) and for I-Share. Based on the ID Card example above this number would be 2041198765432101.

This number is composed of the CARLI member identification number (20411), a student ID number (987654321), an issue number (01), and a site number (278) [not on newer cards]. The site number is not used to form the Library Borrower ID. The number 20411 is the CARLI member identification number.