Question 1

What exactly is a bank slip (boleto)?

Accepted Answer

A boleto is a standardized credit document used in Brazil for bill collection. It contains a barcode, typeable line, amount, due date, and cedent (issuer) information. It can be paid up to 90 days after the due date at banks, lottery outlets, and online platforms.

Question 2

What is the Boleto Generator for?

Accepted Answer

It creates fictitious boletos for testing purposes. Use it to validate input masks, test typeable line processing, simulate payments in development environments, or train teams without using real data.

Question 3

Are generated boletos valid and can they be paid?

Accepted Answer

No. Generated boletos are structurally valid (follow technical standards) but have no legal or financial validity. No Brazilian bank will accept payment of a boleto generated by this tool. They exist only as test data.

Question 4

Can I use generated boletos to issue real charges?

Accepted Answer

Absolutely not. This is fraud and is a crime. Using falsified boletos to attempt to receive payments, deceive people, or commit fraud violates Brazilian law (Cybercrime Law - Law 12.737/12 and Fraud Law - Penal Code, Article 171). This can result in criminal prosecution, substantial fines, and imprisonment.

Question 5

What are the legal implications of misuse?

Accepted Answer

Using falsified boletos for fraud is a federal crime in Brazil. Penalties include: fines up to R$ 150,000, imprisonment of 1 to 3 years, and a criminal record. Additionally, victims can sue civilly for moral and financial damages. Banks and security agencies monitor and investigate fraudulent activities.

Question 6

How do I validate if a generated boleto is correct?

Accepted Answer

A generated boleto is correct if: (1) the typeable line and barcode are continuous numbers without special characters (except in formatted form), (2) the check digit is calculated correctly, (3) dates are in correct format (always future for due date), and (4) the amount is a valid number. Use Box4Dev's Boleto Validator to confirm.

Question 7

What is the difference between a real boleto and a generated one?

Accepted Answer

A real boleto is registered with the bank with a unique identifier, has a verified cedent (company), and can be legally paid. A generated boleto is only structural data, with no bank registration, no verified cedent, and cannot be paid. One is a legal document; the other is just a data structure.

Question 8

Can I share or distribute generated boletos?

Accepted Answer

For educational or development documentation purposes, yes. But never send generated boletos to people with the intention of deceiving them or making them pay. Sharing falsified boletos with fraudulent intent is a crime of fraud and falsification.

Question 9

Is this generator secure? Can I trust the data?

Accepted Answer

Yes, it is secure for legitimate testing use. Data is generated locally following official technical standards. There is no external server transmission. However, technical security does not mean you can use it for fraud - you remain legally responsible for your use.

Question 10

What information do generated boletos contain?

Accepted Answer

Bank (selected or random), agency, account, our number, wallet, issue/due date, document value, cedent (company), document number, payment instructions, payment location, barcode, and typeable line - all generated randomly and without linking to real data.

Question 11

Which bank should I use for testing?

Accepted Answer

Any bank from the list works for testing. Choose one your application needs to process. Barcode validation algorithms are the same for all. What differs is the bank code and specific agency/account rules for some banks - data you control in the generator.

Question 12

Can I import these boletos into a real billing system?

Accepted Answer

It won't work. Real billing systems validate the boleto with the bank - a generated boleto does not exist in the bank and will be rejected. Additionally, injecting falsified boletos is a crime. Always use real data in production and generated boletos only in isolated testing environments.

Boleto Generator

Need to validate a Boleto?

About the Boleto Generator

Frequently Asked Questions