Survey opt-in module troubleshooting

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This article describes some common errors that you might encounter when implementing the survey opt-in module.

If the opt-in module is not visible on your order confirmation page, look for the following possible sources of problems:

Problem	Diagnosis
The HTML code source does not contain the opt-in module code	View the HTML source in your browser and check that exactly one instance of the opt-in module code block appears on the page
The opt-in module is off-screen or blocked by other elements	The module might be rendered beyond the boundaries of the viewable area. Try scrolling
Your browser is unsupported	Your browser must support HTML 5. Update it to the latest version.
E-commerce platform integration	Some e-commerce platforms may have compatibility issues. Reach out to your e-commerce provider to understand implementation options.
Confirmation page on a different domain	If your check-out process uses a third-party processor, it must redirect back to a confirmation page on your domain.
Opt-in module code added to Google Tag Manager	Google Tag Manager currently cannot be used for the opt-in code integration.

The following table lists common sources of issues with the opt-in module's JavaScript:

Problem	Diagnosis
Placeholder values	Replace the placeholder above with your site-specific, dynamic values
A required parameter is missing	When implementing the opt-in module code, the following modules are required: merchant_id order_id email delivery_country estimated_delivery_date
DOCTYPE must be HTML 5	Be sure that your order confirmation page uses the HTML 5 DOCTYPE: <!DOCTYPE html>
estimated_delivery_date is invalid	The date must be in the format YYYY-MM-DD, where YYYY is the four-digit year, MM is the two-digit month, and DD is the two-digit day. The value is a string and must be surrounded by quotation marks. For example, "2016-09-13".
opt_in_style is invalid	The value of the opt_in_style parameter can be one of the following strings "CENTER_DIALOG" "BOTTOM_RIGHT_DIALOG" "BOTTOM_LEFT_DIALOG" "TOP_RIGHT_DIALOG" "TOP_LEFT_DIALOG" "BOTTOM_TRAY"
Website not using HTTPS	All confirmation pages must used HTTPS
Mismatched website URL	The opt-in module code must be implemented on the same website URL as the one verified and claimed in Merchant Center. This issue typically generates a 404 javascript error

Problem	Diagnosis
Incorrect email address	Ensure that you're passing correctly formatted email addresses into the module, otherwise, the survey emails will not be delivered correctly
Incorrect country codes	Ensure that you're passing correct country codes into the opt-in module. This value must be in ISO 3166-1 alpha-2 format. If incorrect country codes are passed, no error will be generated, but the survey will not be sent.
Not enough time has passed	Ensure that the `ESTIMATED_DELIVERY_DATE` for the order has passed. Customers who opt-in to the survey receive an email that asks them to rate their experience in a few days after the estimated delivery date that you included for the order in the survey opt-in module. Additionally, the information shown in Merchant Center graphs can be delayed up to 1 week.

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