Paddle email verification with BillionVerify
Paddle is a merchant of record and payments platform used by software businesses to handle subscriptions, billing, and global tax compliance. Verifying customer email addresses with BillionVerify before or after Paddle checkout events keeps your billing communications deliverable and your customer records clean.
Why verify before the send
In e-commerce and SaaS billing, email is the primary channel for receipts, renewal reminders, and failed-payment alerts. If a customer provides an invalid or disposable address at checkout, these critical messages never arrive — leading to churn, disputes, and support overhead. BillionVerify catches bad addresses early so billing communications always reach real inboxes.
Ready-to-use n8n workflow
Import this workflow into n8n — it verifies every address with BillionVerify before Paddle sends, so only deliverable contacts are emailed. Install the BillionVerify community node first, then add your API key.
{
"name": "Verify emails before sending in Paddle + 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 Paddle contacts",
"message": "Replace this Gmail send with your Paddle 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 Paddle
Ready-to-use workflows that verify emails before Paddle sends.
How it works
- 1
Set up an n8n workflow triggered by Paddle webhook events such as payment completed or subscription created.
- 2
Pass the customer's email address from the Paddle event to BillionVerify via the community node or REST API.
- 3
Receive a verification result flagging invalid, disposable, role-based, or catch-all addresses.
- 4
Route flagged orders to a review queue or trigger a follow-up asking for a corrected email.
- 5
Allow verified addresses to proceed to fulfillment, onboarding, and billing communication flows.
When to use this
Validate email at checkout before fulfillment
Trigger a BillionVerify check on the email address captured during a Paddle checkout event. If the address is invalid, flag the order for review before sending a license key or granting account access.
Keep billing contact lists deliverable
Periodically run your Paddle customer email list through BillionVerify's bulk verification to identify addresses that have become undeliverable, then update or reach out to those customers proactively.
Reduce failed renewal notifications
Before sending subscription renewal or expiry reminders, verify recipient addresses to ensure renewal emails land in real inboxes rather than bouncing and leaving customers unaware.
FAQ
Why would a customer provide an invalid email at checkout?
Typos are the most common cause. Some users also enter disposable addresses to avoid marketing emails, but this blocks critical transactional messages like receipts and access credentials.
Can BillionVerify integrate with Paddle without n8n?
Yes. BillionVerify's REST API can be called directly from your backend or via Integrately's 1-click connector, giving you flexibility in how you build the integration.
Will verifying emails slow down the checkout experience?
BillionVerify returns results in under a second for real-time checks, so when integrated post-checkout via webhook it adds no friction to the buyer experience at all.
Does BillionVerify work with Paddle's subscription renewal events?
Yes. Any Paddle webhook event that carries an email field can trigger a BillionVerify check in your n8n workflow, including subscription renewals, failed payments, and plan changes.
Verify emails in Paddle
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