Validation (input)
Checking that data meets required constraints before it enters a workflow. Examples: verifying an email is properly formatted, a date is in the future, a required field is not null. Validation at the entry point prevents downstream failures.
Expert insight
Validation that happens only at the very end of a workflow, after several steps have already acted on the data, means bad data can trigger real side effects (an email sent, a record created) before the invalid data is even caught. Validating as early as possible, ideally right after the trigger, limits the blast radius of bad input.
In a real workflow
An order without a shipping address is rejected with a clear message before fulfilment.
Common mistakes
- Validating too late.
- Validation rules that differ between tools.
Complexity level
Anyone can understand this no technical background needed.
Related terms
See it in action
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Go deeper
Guides that cover Validation
n8n HTTP Request Node: Complete Documentation and Examples
The HTTP Request node is the most used node in n8n, connecting your workflows to any API or web service. This guide covers every configuration option, authentication method, error handling pattern, and real-world example you need.
Stripe to QuickBooks Integration: The Automation That Eliminates Manual Bookkeeping
Every Stripe payment that gets manually re-entered into QuickBooks costs 4-7 minutes and carries a 12% error rate. Here is the integration that ends that entirely, syncing every charge, refund, and subscription event in real time.
Student Enrollment Automation: How Schools Cut Admin Time by 70%
Manual enrollment processing costs schools 45-90 minutes per student across document collection, verification, and system entry. Automation reduces that to under 8 minutes while improving data accuracy.