Common Errors and Remedies
1. reCAPTCHA token validation error
Symptoms:
A “reCAPTCHA error” message appears when making a booking or submitting a form
Submission is not completed.
Possible cause:
Failure to load reCAPTCHA script
Network connection problem
Browser settings (e.g. cookie blocking)
Remedy:
Reload the page
Try another browser
Turn off Private Browsing mode
Check your network connection
2. Script loading error
Symptoms:
Errors such as “Recaptcha script is not loaded” are displayed in the console
The reCAPTCHA function does not work
Possible causes:
Internet connection problem
Access to Google's servers is blocked
Interference by browser extensions
Remedy:
Check network connection
Temporarily disable browser extensions
Clear DNS cache
3. Score evaluation error
Symptoms:
Legitimate users are treated as spam
Or, obvious spam gets through
Possible cause:
Incorrect score level settings
False reCAPTCHA decision
Remedy:
Adjust the score level (lower if too strict, raise if too loose)
Change the filter type (e.g., from “treat as unauthorized access” to “treat as spam”)
How to check if reCAPTCHA works on booking pages and forms
To check if your reCAPTCHA settings are working properly, you can use the following methods
Test booking/form submission:
Test booking and form submissions to make sure they are processed correctly.
Testing on different devices and browsers
Test spam filters (for developers):
In the development environment, debug scores can be used to test with specific scores
Use the recaptchaScore parameter to verify behavior with different score values
Check logging:
Check reCAPTCHA events in Amplitude Analytics
Analyze score distribution and rejection rates
Advanced Utilization Scenarios
1. Tiered security settings
If you have multiple booking pages or forms, you can set different security levels depending on the level of importance:
High security (forms with sensitive information):
Score level: 0.7 to 0.9
Filter type: Treat as unauthorized access
Standard security (general booking):
Score level: 0.5
Filter type: Treat as spam
Low security (general queries):
Score level: 0.3
Filter type: Treat as spam
2. Spam analysis and enhanced countermeasures
By periodically analyzing the contents of transmissions processed as spam, patterns can be identified and countermeasures can be strengthened:
If there are many unauthorized accesses from a specific IP address, consider IP blocking
If spam is concentrated during certain time periods, increase the security level only during those times
Frequently Asked Questions and Answers
Q: Will enabling the reCAPTCHA linkage affect the bookings of legitimate users?
A: At the recommended setting (score level 0.5), most legitimate users will not be affected. However, a higher score level may cause some legitimate users to be misclassified as spam.
Q: When will reCAPTCHA changes take effect?
A: Changes to your settings will take effect immediately. After the change is made, the new settings will be applied to new bookings and form responses.