There can be certain cases where users might not wish to share their Truecaller profile information with your mobile website, and may dismiss the profile dialog when invoked. For such cases, we pass appropriate error message to your callback URL so that you can accordingly take the next steps.
Other error scenarios might include cases where your backend fails to fetch user profile information from Truecaller probably due to some internal or network failure. These cases can be identified by having a threshold timeout ( recommended 30 seconds ) implemented with your client-server communication mechanism. In scenarios like above, where the user verification via Truecaller could not be completed, you should ideally show a proper error message to the users and take them to your alternate verification flow.