Latenode
HighLevel
Lob

Automatically verify and update HighLevel contact mailing addresses

This Latenode automation template helps businesses that use the HighLevel CRM platform to automatically verify the deliverability of mailing addresses for new contacts.

It integrates with the Lob address verification service to check the validity of each new contact's address, and then updates the HighLevel record accordingly, tagging the contact as having a verified or non-deliverable address. This allows users to take appropriate actions, such as notifying their team to manually verify problematic addresses. By automating this process, the template helps maintain accurate mailing address data in the HighLevel CRM, improving customer communications and reducing returned mail.

Updated Apr 2, 2026Est. run: 13sEst. cost: $0.0008
How Latenode estimates time and cost

Latenode bills workflow runs in credits: 1 credit = 30 seconds of processing. Minimum charge per run depends on your plan. Plug-and-Play (PnP) AI nodes are billed separately—each PnP token is $1 USD, charged pay-as-you-go at vendor cost plus a small processing fee, with no API keys required.

Full pricing — how credits work →
Documents & invoicing

Workflow preview

What this template does

  • Automatically verifies the deliverability of new contacts' mailing addresses in HighLevel CRM using the Lob API.
  • Updates HighLevel contact records to indicate verified or non-deliverable addresses.
  • Allows users to take appropriate actions on problematic addresses, such as manual verification.
  • Maintains accurate mailing address data in HighLevel CRM, improving customer communications.
  • Reduces returned mail by identifying non-deliverable addresses before sending communications.

How it works

1
Trigger

New Contact Webhook

Receive a webhook from HighLevel when a new contact is created. This triggers the automation to begin verifying the mailing address.

2
Logic

Extract Address Fields

Extract the address, city, state, and zip code from the HighLevel webhook payload data.

3
Action

Verify Address Deliverability

Send the extracted address information to the Lob API to verify the deliverability of the mailing address.

4
Logic

Deliverability Status

Check the response from the Lob API to determine if the address is deliverable or not.

5
Action

Update HighLevel - Deliverable

If the address is deliverable, update the HighLevel contact record by tagging the contact as having a verified mailing address.

6
Action

Update HighLevel - Non-Deliverable

If the address is non-deliverable, update the HighLevel contact record by tagging the contact as having a non-deliverable mailing address.

Setup guide

1

Add HighLevel Credential

Add your HighLevel API credential in the Latenode Credentials panel. This will allow the workflow to securely access your HighLevel CRM data.

2

Add Lob Credential

Add your Lob API credential in the Latenode Credentials panel. This will enable the workflow to verify mailing addresses using the Lob address verification service.

3

Configure HighLevel Trigger Node

In the Latenode builder, add a HighLevel Trigger node and configure it to listen for the 'New Contact' webhook from HighLevel. Map the relevant contact data fields (address, city, state, zip) to the node's output.

4

Configure Lob Address Verification Node

Add a Lob Address Verification node to the workflow. Connect it to the output of the HighLevel Trigger node, and map the contact address fields to the node's input.

5

Configure HighLevel Update Nodes

Add two HighLevel Update nodes to the workflow - one to update the contact record with a 'Deliverable' tag, and another to update the record with a 'Not Deliverable' tag. Connect these nodes to the Lob Address Verification node's output, and map the relevant fields.

Requirements

HighLevel CRM account with admin access
Lob API key for address verification service
Ability to create/configure Latenode automation within your workspace
Latenode workspace with 'code' and 'highlevel' nodes installed

FAQ

Common questions about this template

Each run uses credits on your Latenode plan. We charge for processing time (1 credit = 30 seconds). Your actual cost depends on your plan and how long the run takes. See pricing plans for plans and how credits work.
Contact support →

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