Customer Validation Method to Prevent Fake Orders in Brazil

Rafael Mendes · 2026-10-07

Customer validation is essential for reducing fraud and fake orders in e-commerce. Below, I’m sharing a practical method you can implement.

Using cpf as a verification tool

The first step is to ask for the CPF at checkout. Use CPF verification APIs to confirm that the number is valid and associated with a real name. If the CPF has inconsistencies, such as being pending with the Federal Revenue Service, consider blocking the sale or requesting additional documents.

Analyzing previous purchase history

Another crucial point is analyzing customers’ purchase history. If a new customer has tried to make purchases before and failed (such as cancellations or unpaid orders), that should trigger an alert. Use a CRM system that lets you view previous interactions. If the customer already has a good track record, you can approve them more easily.

Email and phone confirmation

Verifying the email and phone number is an essential step. Send a confirmation link to the email and an SMS code to the phone number provided. If the customer doesn’t complete this step, consider the order potentially fraudulent. Confirmation helps ensure the customer is who they say they are and reduces the chance of fraud.

Creating risk profiles for new customers

Create a scoring system for new customers. Consider factors such as location, payment method, purchase amount, and order frequency. If a customer gets a high score, put them on a manual review list. This lets you keep a closer eye on new customers.

Implementing community feedback on fraud

Finally, implement a system where customers can report fraud. This can be done through a section on your website or even on social media. Community feedback can help identify suspicious behavior patterns. Consider creating a “blocked customers” section based on reports from other users, increasing transparency and security.

In short, combining these techniques can help significantly reduce fraud. Implementation should be done in a way that doesn’t disrupt the customer experience while adding an extra layer of security.

How many fraudulent orders have you managed to prevent in your operation this month?