Why am I seeing an E503 error when trying to use iThenticate?

When attempting to log in or submit documents to an institutional iThenticate account, you may encounter the following error message:

Error message: E503 Loading Error - The request failed because this item does not exist or is not available to you


Cause

An E503 error on an institutional account indicates a subscription license issue. This typically occurs for one of two reasons:

  • Your institution's iThenticate license contract has not yet reached its official start date.
  • Your institution's iThenticate account license has expired.

Resolution

Select your role below for instructions on how to resolve this issue:

For users For administrators

Individual account holders cannot resolve license dates directly. If you receive error E503 on an institutional account:

  1. Contact your institution's iThenticate account administrator.
  2. Inform them that you are receiving error code E503 and ask them to verify your institution's active license status.
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