Check bank details fast to keep you focused on your business

High-Volume Bank Account Validation API

Need to check 50,000+ UK bank accounts a month? Learn how to validate sort codes and account numbers at scale via API, with code examples and volume pricing.

The importance of checking bank account details

One mistyped digit can send money to a stranger's account - and your bank has done nothing wrong. What validation catches, and what it doesn't.

What is Modulus Checking?

The arithmetic UK banks build into account numbers, the three algorithms behind it, and the response case that trips up new integrations.

Our Guide to Automated Bank Account Checking

Where to put a validation check in your workflow, what an API call actually looks like, and how to work out whether automating is worth it.

EISCD Data File: The UK Sort Code Directory Explained

What is actually in the UK sort code directory, including the future-dated changes and redirection data most teams do not realise they have.

Checking sort code and bank account numbers

A short introduction about sort codes, modulus checking and what you need to think about when automating it.

SWIFT codes and IBANs explained

How BIC and IBAN are structured, how the MOD-97 check digits work, and why most validators miss the national check digits underneath.

How Mintly can help with pre-AUDDIS checks

Validate bank details before AUDDIS submission to cut Direct Debit rejections. Learn how pre-AUDDIS checks keep your Bacs setups clean.

Sort codes: What you need to know

What the six digits mean, why guessing the bank from the first two is unreliable, and what a sort code check tells you beyond existence.

BACS and Direct Debits: What you need to know

The three-day Bacs cycle, the Direct Debit Guarantee, and what the ARUDD, ADDACS and AWACS reports are actually telling you.

Bank Validation APIs

APIs let your systems validate bank details in real time. Learn how bank validation APIs work and what to look for in a provider.

GDPR and Compliance

Bank details are not special category data. What UK GDPR actually requires when you hold them, and what to ask a validation provider.