Address Validation Addon for WHMCS

Address Validation Addon for WHMCS

Developed By Poseidon Hosting

Compatible with WHMCS v7.9

With this addon, the system will automatically validate the address of a new customer when submitting an order with multiple databases all around the world if the address is valid and actually exists.

If the customer only mistyped something and we were able to find a matching address (match more then 85%), we will replace the current user input with the matching address to keep your customer's data formatted and correct.

Costs per Request:

  • United States Address: 0,03 €
  • German Address: 0,06 €
  • International: 0,13 €

Possible results

  • Valid: The Address is valid and approved. The user will proceed as usual
  • Suspect: The Address is not found but a nearly matching address was found. The user will be able to proceed as usual but the address will be formatted and replaced with the matching address.
  • Invalid: The Address is not valid and the user won't be able to proceed in the checkout. The error message provided in the settings is shown to the user.

No unexpected costs!

Due to the fact that our system works with prepaid account balance, you can only spend the amount you have on your account. If your account doesn't have any credits anymore, you will be informed by E-Mail. If your account balance is not high enough to perform a request, your customer will be able to proceed with the order but no address validation will be performed.

Subscription Payment?

If you would want you can contact our support in the ticket system and ask for a subscription payment which we will set up for you.

Want to try it out?

If you want to try it out, contact our support and get 1€ credit for free to test it yourself.


What happens if the address is not found? We are checking multiple databases including the database of post companies all around the world (which usually have all valid addresses of their restriction) so when an address is not found in the system it is most likely invalid.

What happens if my credit balance is too low? If your credit balance is too low to perform a request, your customer will be able to proceed with the shop without the address validation. You will be informed via E-Mail when your balance is getting low or is too low to perform a request.

More questions? Write


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Version Compatibility

Compatible with WHMCS v7.9

Full Version Compatibility

  • Selected versions of WHMCS v7.9
        7.9.0 - 7.9.1
  • All versions of WHMCS v7.8
  • All versions of WHMCS v7.7

System Requirements

  • PHP 7.2+
  • Poseidon Hosting Account Balance

* Requirements listed are in addition to the WHMCS default system requirements.

Support for this product

The best place to start if you need help with a specific product is to contact the developer. All WHMCS Marketplace developers have both a website and support URL listed.

Developed By Poseidon Hosting


v1.0.0 Released February 1st, 2020

Latest Version



See also

FraudLabs Pro Fraud Prevention

Fraud prevention plugin to detect payment fraud - reduce fraud chargeback & high risk transactions

Order Notes

Staff need to make a note

WHMCS Order Assistant

Order Assistant helps you to automate order management process. It can automatically accept Pending Orders; send an email or open a ticket with client; and cancel the order if no payment is made still.

Product Limiter

Allows you to limit the purchase of an products/services for each client

IPQS Fraud Prevention & Order Validation

Accurate risk analysis for orders & users to prevent fraud and minimize chargebacks.