Implementing conditional fallback logic for empty fields in email templates

Last updated: April 1, 2026

When personalizing email templates, you may want to implement conditional logic that uses different fields based on data availability (e.g., use field A, if empty use field B, if both empty use generic text). However, the platform doesn't support hierarchical fallback logic within a single Smart Snippet.

Understanding the limitations

The system cannot implement layered fallback logic (A → B → generic) within one snippet. Additionally:

  • Email template editor doesn't support direct conditional field logic

  • There is no 'neutral snippet slot' placeholder that can be dynamically replaced

  • Multiple variable conditional logic requires multiple sequences rather than a single dynamic snippet

Assessing your fallback needs

Before implementing complex fallback logic, evaluate your data completeness. For sequences targeting contacts in your CRM, if you have complete data points for all contacts, you can use CRM values directly in the sequence without needing fallbacks. Using generic text temporarily is also a viable approach to start sending emails while setting up more advanced personalization.

Workaround solutions

1. Multiple sequences approach (Play If/Else architecture)

Create separate sequences with different snippets and use Play If/Else logic to route contacts based on field availability:

  1. Create single-variable snippets:

    • snippet_primary uses only {{primary_field}}

    • snippet_secondary uses only {{secondary_field}}

    • snippet_generic with static text

  2. Structure your Play If/Else conditions:

    • If primary_field is not empty → enroll in sequence with snippet_primary

    • Else If secondary_field is not empty → enroll in sequence with snippet_secondary

    • Else → enroll in sequence with snippet_generic

Important: Each snippet should contain only one variable to avoid fallback triggering.

2. Smart snippet guidance for null field handling

For more dynamic null field handling, use the guidance section in Smart Snippets:

  • In the smart snippet guidance section, specify conditions like "If data field returns null, use [specific phrase]"

  • This provides an alternative to static fallback text for more dynamic null handling

  • Combine this approach with the snippet's fallback text as a secondary safety net

3. Basic snippet fallbacks for simple cases

When CRM data points might be null, you can create a snippet that includes both the CRM field and a fallback value in case no data is available. This approach works well for single-field fallback scenarios where you need one backup option.

Best practices

  • Start with simple fallback scenarios before implementing complex conditional logic

  • Test your sequences with contacts that have varying data completeness

  • Consider using generic text temporarily while setting up more sophisticated personalization

  • Evaluate whether multiple sequences or smart snippet guidance better fits your use case