Invoiced email verification with BillionVerify
Invoiced is a billing and accounts-receivable platform used by subscription and B2B businesses to automate invoicing, collections, and payment workflows. Connecting BillionVerify to Invoiced via n8n or the REST API ensures that every customer email stored in your billing system is real and deliverable before invoices and dunning emails are sent.
Why verify before the send
Bounced invoices create cash flow gaps and damage your sending domain. Role addresses like accounts@company.com often go unmonitored, and disposable emails indicate low-quality signups. BillionVerify filters these out so your billing communications reliably reach decision-makers.
Ready-to-use n8n workflow
Import this workflow into n8n — it verifies every address with BillionVerify before Invoiced sends, so only deliverable contacts are emailed. Install the BillionVerify community node first, then add your API key.
{
"name": "Verify emails before sending in Invoiced + BillionVerify",
"nodes": [
{
"parameters": {},
"type": "n8n-nodes-base.manualTrigger",
"typeVersion": 1,
"position": [
240,
300
],
"name": "When clicking ‘Test workflow’"
},
{
"parameters": {
"assignments": {
"assignments": [
{
"id": "email-field",
"name": "email",
"value": "jane@example.com",
"type": "string"
}
]
},
"options": {}
},
"type": "n8n-nodes-base.set",
"typeVersion": 3.4,
"position": [
460,
300
],
"name": "Get contacts"
},
{
"parameters": {
"sendTo": "={{ $json.email }}",
"subject": "Message for Invoiced contacts",
"message": "Replace this Gmail send with your Invoiced node — only deliverable, verified contacts reach it.",
"options": {}
},
"type": "n8n-nodes-base.gmail",
"typeVersion": 2.1,
"position": [
900,
300
],
"name": "Send email",
"webhookId": "",
"credentials": {
"gmailOAuth2": {
"id": "",
"name": "Gmail account"
}
}
},
{
"parameters": {
"operation": "verify",
"email": "={{ $json.email }}",
"additionalOptions": {}
},
"type": "n8n-nodes-billionverify.billionVerify",
"typeVersion": 1,
"position": [
540,
300
],
"name": "Verify Email (BillionVerify)",
"credentials": {
"billionVerifyApi": {
"id": "",
"name": "BillionVerify account"
}
}
},
{
"parameters": {
"conditions": {
"options": {
"caseSensitive": true,
"leftValue": "",
"typeValidation": "loose"
},
"combinator": "and",
"conditions": [
{
"id": "is-deliverable",
"leftValue": "={{ $json.is_deliverable }}",
"rightValue": "",
"operator": {
"type": "boolean",
"operation": "true",
"singleValue": true
}
}
]
}
},
"type": "n8n-nodes-base.if",
"typeVersion": 2,
"position": [
720,
300
],
"name": "IF deliverable"
}
],
"connections": {
"When clicking ‘Test workflow’": {
"main": [
[
{
"node": "Get contacts",
"type": "main",
"index": 0
}
]
]
},
"Get contacts": {
"main": [
[
{
"node": "Verify Email (BillionVerify)",
"type": "main",
"index": 0
}
]
]
},
"Verify Email (BillionVerify)": {
"main": [
[
{
"node": "IF deliverable",
"type": "main",
"index": 0
}
]
]
},
"IF deliverable": {
"main": [
[
{
"node": "Send email",
"type": "main",
"index": 0
}
],
[]
]
}
},
"settings": {
"executionOrder": "v1"
}
}Workflow templates with Invoiced
Ready-to-use workflows that verify emails before Invoiced sends.
How it works
- 1
Connect BillionVerify to your n8n instance using the community node or a direct HTTP Request node.
- 2
Trigger the workflow from an Invoiced webhook when a new customer is created or an email address is updated.
- 3
Send the email to BillionVerify and receive a structured result with deliverability status and risk flags.
- 4
Route valid addresses back to Invoiced for normal billing; quarantine or update records with invalid addresses.
- 5
Schedule periodic re-verification runs to keep your customer email list fresh over time.
When to use this
Clean emails at customer onboarding
Verify each customer's billing email as soon as they are created in Invoiced. Catching undeliverable addresses before the first invoice is sent prevents bounce-related payment delays and keeps your accounts-receivable process on track.
Audit existing customer lists
Run a bulk verification pass over your current Invoiced customer records using the BillionVerify API. Replace or flag outdated addresses before your next billing cycle to reduce hard bounces and maintain a healthy sender score.
FAQ
Why do invoices sometimes bounce even to corporate addresses?
Catch-all domains accept any email at the SMTP level but may silently discard messages. BillionVerify identifies catch-all addresses so you can treat them with extra caution.
Is there a bulk API for verifying large customer lists?
Yes. BillionVerify's REST API supports bulk submission, making it straightforward to audit thousands of Invoiced customer records in a single batch job.
Does this work with Integrately as well as n8n?
Absolutely. If you prefer a no-code approach, the BillionVerify Integrately integration lets you connect to Invoiced events with a 1-click setup and no custom code.
Verify emails in Invoiced
Create a free account, grab your API key, and stop bounces before they happen.
Get started free