Dear Google Ads API Support Team,
I am currently implementing Enhanced Conversions for Leads using the Google
Ads API. On the client side, we are using `gtag('set', 'user_data')` to
pass normalized but unhashed email addresses. On the server side, we are
uploading hashed user identifiers using the `UploadClickConversions`
endpoint.
Despite this setup, we're seeing the message in Google Ads:
**"No user-provided data matches – Your Google tag is implemented correctly
on your website form, but there have been no matches with your imported
user-provided data."**
We followed the hashing guidance from the documentation [
https://developers.google.com/google-ads/api/docs/conversions/upload-offline#prepare-data],
and our implementation hashes normalized email addresses using SHA-256.
However, we recently noticed that our C# implementation was producing
**uppercase hexadecimal hashes**, while Google-provided examples and tools
(Apps Script extension) output lowercase hashes.
Could you please confirm:
1. Does the casing of the hexadecimal hash (uppercase vs lowercase) affect
Google's ability to match user data?
2. Is it a strict requirement to send lowercase SHA-256 hashes in API
requests?
Thank you for your assistance.
Best regards,
Muhammad Adnan
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