An n8n workflow that checks a lead before your CRM ever sees it

Most free form-to-CRM templates push whatever comes in straight through: bot spam, typo'd emails, blank names, all of it lands in your contact database. This one validates first and flags the rest.

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The problem

Most free form-to-CRM templates push whatever comes in straight through: bot spam, typo'd emails, blank names, all of it lands in your contact database. Now your CRM is dirty and someone has to clean it up by hand.

What this workflow does

Receives the submission on a webhook from any tool that can POST JSON (Typeform, Tally, Webflow, a custom page).
Normalizes the fields: trims and standardizes name and email before they're checked.
Validates the gate: a real name and a well-formed email address have to be present, or the submission does not pass.
Upserts valid leads to your CRM (wired for HubSpot's Contacts API) and posts a "new lead" message in Slack.
Routes failed submissions to a separate Slack channel for a human to glance at, instead of silently dropping them or writing them to the CRM unchecked.

Before and after

A bare webhook-to-CRM wrapper

Bot spam, typo'd emails, and blank names all land in your CRM unchecked.
Nothing tells you a submission was rejected, it is just dropped or written anyway.
Someone has to clean the CRM up by hand, on a schedule.

With this workflow

The normalizer, validation gate, CRM upsert, and both Slack branches are real, wired logic, tested end to end on a live n8n instance.
Nothing is silently dropped: every submission ends up somewhere you can see it.
A 15-minute setup guide covers switching the CRM step off HubSpot, plus a troubleshooting table.

What you get

The workflow JSON: form webhook, field normalizer, validation gate, CRM upsert, two Slack notification branches for valid and flagged submissions.
A setup guide: prerequisites, 15-minute walkthrough, switching CRMs, troubleshooting table.
A test checklist showing exactly what was run against a live n8n instance, and the result.

Who it's for

Ops people and small agencies whose form-to-CRM pipeline currently accepts anything, typos, blank names, bot spam included, and pushes it straight into the CRM. If you're tired of cleaning that up by hand, this pack checks each submission before it lands.

FAQ

Does this need a HubSpot account?

The CRM upsert step ships wired for HubSpot's Contacts API. Switching to another CRM is a URL and field-name change, covered in the setup guide.

What counts as a valid submission?

A non-empty name field and a well-formed email address. The setup guide covers adjusting the validation rule if you need stricter or looser checks.

What n8n version was this tested on?

n8n 2.35.5. Pinned version and update policy are in the setup guide.