Published on Dec 11, 2023
Olivia Williams
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Unleashing the Power of IBAN Validation

IBAN validation is the process of verifying the accuracy and legitimacy of an International Bank Account Number (IBAN) before processing a transaction. It helps improve accuracy, efficiency, security, and compliance in international transactions.


The International Bank Account Number (IBAN) is a very powerful tool used in the modern banking system. It is unique to each bank account all over the world and provides e-commerce businesses with higher efficiency and speed during international transactions.

In this article, you will learn more about IBAN validation and how it improves e-commerce businesses.

What is IBAN?

The International Bank Account Number (IBAN) is a standardized system used to identify bank accounts when making international transactions. It is a unique code given to each bank account that enables accuracy and security during electronic payments which involves transfer of funds between different banks and countries.

The IBAN is used to ensure that international payments are processed correctly and efficiently, and it typically includes the country code, check digits, and the basic bank account number.

Why IBANs were created

The IBAN system was created to make international transactions easier. However, they can also be used for domestic transactions. They include the information of the specific bank, the location of the bank, and other account details of the account holder aside from the account number and sort code. This additional level of security helps prevent transaction errors, rejected payments, and transfer delays across borders. They can also be used for sending or receiving funds, as well as other transactions like cash withdrawals.

Understanding the Structure of IBAN

  1. IBANs consist of a country code, two check digits, and a simple bank account number. The country code is a two-letter code used to check the country where the bank account is held. The check digits are made up of two numbers which are used to validate the IBAN. The basic bank account number consists of a series of alphanumeric characters used for the identification of each bank account.
  2. IBANs have different lengths, according to the country holding the bank account. For example, the IBAN in Norway contains 15 characters while that in Germany contains 22 characters. This makes it a little difficult to work with IBANs, as you would need to understand IBANs properly.
  3. IBANs are different from SWIFT codes, which are used for the identification of specific banks. SWIFT codes consist of eight or eleven characters and are used for the identification of a specific bank during an international transaction while IBANs are used for the identification of a specific bank account.

IBAN Syntax

IBANs share a particular piece of information with banks. They start with a two-letter country code—like ‘FR’ for France and ‘DE’ for Germany. The next two digits are control checks, which serve as a security layer unique to your bank. The other numbers are domestic banking details, also referred to as your Basic Bank Account Numbers (BBAN). The BBAN information consists of a bank code and branch reference, as well as the account number. Different IBAN regions use different formats.

How to Check the Validity of an IBAN?

During international transactions, it is important to ensure the payment reaches the correct recipient and prevent fraud. Follow this guide to check the validity of an IBAN.

1. IBAN Structure

Before validating an IBAN, you have to first understand its structure. There are about 34 alphanumeric characters in an IBAN and it is further divided into four parts: the country code, check digits, bank code, and account number. Each country has a unique IBAN format, which can be found online.

2. Check Digits

These are important components of the IBAN which help ensure its accuracy. They can be calculated with a mathematical formula used to detect any errors that can result after the IBAN is entered. Before making any payment, ensure you verify the check digits first.

3. IBAN Validation Methods

There are multiple methods available for the validation of an IBAN, the one that is usually used is the MOD97 algorithm. It is concerned with the division of the IBAN by 97 and checking the remainder. If 1 is the remainder, then the IBAN is valid. Online tools are also utilized by most banks and financial institutions to validate IBANs.

What is IBAN Validation?

IBAN validation is the process of verifying the accuracy and legitimacy of an International Bank Account Number (IBAN) before processing a transaction. This involves checking the IBAN structure, country code, and checksum to ensure that the bank account is valid and can be used for international payments. This is important because even a small error in an IBAN can cause a payment to be rejected.

IBAN validation helps to reduce errors, improve efficiency, enhance security, and ensure compliance with international standards for cross-border payments. It offers various benefits for banks, financial institutions, and individuals involved in international transactions, including cost savings and customer confidence.

IBAN validation is typically done by software programs that are designed to check the format of an IBAN and compare it against a list of known valid IBANs. If an IBAN passes the validation process, it's considered to be valid. This helps to ensure that payments are processed correctly and that money is sent to the intended recipient.

How does IBAN Validation Benefit the E-commerce Businesses?

The use of IBAN is beneficial to individuals and businesses who perform international transactions. Some of the benefits are:

1. Accuracy: With IBAN validation, errors of incorrect account details and misdirected payments are eliminated as it provides each account with a unique identifier .

2. Efficiency: IBAN facilitates quick onboarding and fast payment processing by providing all the important information in one place. This results in faster transactions as it lowers the time and effort required to process payments. By validating IBANs, banks can process international payments more quickly and efficiently, reducing delays and improving overall transaction speed.

3. Reduced costs: By reducing errors and streamlining the payment process, IBAN validation can help to save money for both individuals and businesses involved in international transactions.

4. Security: IBAN validation helps to prevent fraud and unauthorized transactions by verifying the legitimacy of the bank account being used during e-commerce transactions.

5. Global acceptance: IBAN is accepted globally, which makes it much easier for individuals and businesses to perform e-commerce across different countries. E-commerce merchants can use it to make payments to almost every country in the world without searching for extra information or documentation.

6. Compliance: IBAN validation ensures that banks and financial institutions comply with international standards for cross-border payments, helping to prevent regulatory issues and penalties.

7. Customer confidence: Using IBAN validation can help to build trust and confidence among customers, knowing that their international payments are being processed accurately and securely.


The most common problem faced by e-commerce merchants during international transactions is incorrect account details or failed transfers which can occur due to human error, incomplete or outdated data, or incorrect formatting. Using such incorrect IBANs can lead to failed transactions, delays, and additional costs for businesses and individuals.

Therefore, e-commerce merchants are expected to make use of IBAN validation which plays a crucial role in facilitating international payments and ensuring that funds are transferred securely and accurately between different countries and has become an essential part of the global banking system and is widely used for all types of international transactions.

At Greip, businesses are provided with a reliable IBAN validation system that efficiently reduces transaction errors.


IBAN: The Backbone of International Business Transactions

The Power of IBAN in Payment Validation: Ensuring Accuracy and Security

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