What is Offline Conversion Import

Offline conversion import is the practice of uploading conversions that happen outside an ad platform back into it, matched to the original ad click. Google Ads does this with click IDs or with hashed contact details through enhanced conversions for leads, Meta uses its Conversions API, and Microsoft Advertising supports offline conversion uploads. For a credit union, the conversions that matter, such as a funded loan, a funded account, or a direct deposit, happen days or weeks after the click and are recorded in the LOS, the account-opening platform, or the core. Importing them lets automated bidding favor the audiences and keywords that produce members and balances instead of form fills.

Why Ad Platforms Need Results From Your Systems

Automated bidding optimizes toward whatever conversion it is given. If the conversion is an application start, the platform learns to find people who start applications, including many who never finish or never qualify. For a lender, that can mean paying more for applications that never fund.

Importing downstream results changes the signal. When a funded loan or funded account is sent back with a value, the platform learns which audiences, keywords, and placements produce members and balances. It also lets the credit union see cost per funded account by campaign inside the ad platforms, not only in a separate spreadsheet.

How the Import Works

  • Capture the click. Store the ad click ID, such as Google's GCLID or Meta's click ID, and UTM parameters when the visitor lands, and carry them into the application in the LOS or account-opening platform.
  • Record the outcome. When the application funds, export the click ID, the conversion name, the time, and a value.
  • Upload on a schedule. Send the file or API call daily or weekly. Platforms set time limits, such as Google's limit of 90 days from the click for click-ID imports, so slow-funding products like mortgages need planning.
  • Choose a value. Use a consistent value per product, or an estimate of what the relationship is worth, so bidding weighs a home equity loan differently from a savings account.

Member Data, Privacy, and Compliance

Credit unions operate under federal privacy rules for member financial information and under their own privacy commitments, so anything that leaves the credit union's systems needs compliance approval.

  1. Prefer click IDs. An upload of click ID, conversion name, time, and value contains no member information.
  2. Use hashed contact matching only with approval. Enhanced conversions and the Conversions API can match on hashed email or phone, which improves match rates but still sends personal data in hashed form. The compliance team should approve it, and the privacy notice should cover it.
  3. Never send account details, balances, or credit information. A value per conversion is enough.
  4. Document the data flow, the fields sent, and who approved it, so the practice can be explained to examiners and the board.