Technical Support: "Tag is missing user-provided data" warning for Enhanced Conversions via API

[Nam Gia]

Dear Google Ads Support Team,

I am writing to request assistance regarding two technical warnings currently appearing in my Google Ads account. I have attached screenshots of these warnings for your reference.

1. Problem Description: My account is currently displaying two main warnings:

• Warning 1 (Urgent): "Tag is missing user-provided data."

• Warning 2 (Related): "Some attribution data not available."

These warnings are affecting our critical conversion actions, including Purchase, Add to Cart, and Begin Checkout.

2. Current Implementation Setup: We are currently using a hybrid tracking setup that combines both client-side and server-side tracking:

Client-side tracking:

• We have gtag.js implemented on our website (ID: AW-XXXXXXXXXXX)

Server-side tracking:

• We are simultaneously using Conversion API (CAPI) to send Enhanced Conversions directly from our server to the Google Ads API

• Our CAPI payload includes the userIdentifiers object with properly hashed user data

3. CAPI Implementation Details: We have thoroughly reviewed our server-side implementation and believe we have followed Google's guidelines correctly:

• API Payload: We have confirmed that our CAPI payload includes the userIdentifiers object with hashedEmail (and hashedPhoneNumber when available). Both email and phone numbers are normalized (lowercase, trimmed) and hashed using the SHA-256 algorithm before submission.

• Payload Example: Below is an actual example of the payload we are sending for a purchase event:

• Waiting Period: We have implemented this setup and monitored for over 72 hours, but the warnings persist.

4. Our Analysis: We suspect that Google Ads' automated diagnostic system is only checking our client-side implementation (gtag.js/GTM) and not recognizing that we are successfully sending Enhanced Conversions data via our server-side CAPI implementation. This may be causing the system to incorrectly flag our setup as missing user-provided data, even though we are providing it through the API.

5. Request for Support: Given our hybrid setup, we would appreciate your assistance with the following:

1. Server-side verification: Please verify on Google's server-side whether our account is correctly receiving Enhanced Conversions data with proper user identifiers through our CAPI implementation.

2. Diagnostic system clarification: Can you confirm whether the diagnostic warnings are only checking client-side implementation and not accounting for server-side CAPI submissions?

3. Resolution guidance: If our CAPI data is being received correctly, please assist us in resolving these diagnostic warnings. If there are any issues with our payload format or implementation, please specify them so we can rectify the issue.

4. Best practice recommendation: Given our current hybrid setup, what would be the recommended approach to ensure both accurate tracking and elimination of these diagnostic warnings?

We greatly appreciate your assistance in ensuring accurate conversion measurement and campaign optimization.

Thank you for your time and support.

Best regards, Nam Gia