Errors are found after submit
The user has already left the field — or the page — when a downstream system reports the problem.
IBAN Validation & Bank Lookup
Validate an IBAN while the user is still in your existing form.
WebXtend checks IBAN structure and checksum locally in the browser, derives the German bank code and can resolve the bank before the form is submitted. The surrounding application stays unchanged.
Catch formal IBAN errors before they become correction work.
A mistyped or malformed IBAN can trigger manual follow-up, rejected downstream processing or an unnecessary correction loop. The earlier a formal error is detected, the easier it is for the user to fix.
Bank feedback is missing
A structurally valid value gives the user little confidence when the expected bank cannot be shown in context.
Sensitive data is over-shared
A lookup integration should not require the full account identifier when a smaller derived value is sufficient.
What WebXtend checks
The solution separates checks that can happen locally from the bank lookup that needs reference data.
Read the existing field
The IBAN remains an ordinary input in the current form.
Validate locally
Structure and checksum are evaluated in the browser before any lookup is required.
Resolve the bank
For German IBANs, only the derived eight-digit bank code is used for the bank lookup.
Return the result
Validity and bank information can be displayed or used by the existing page immediately.
Privacy-conscious validation by design
Full IBAN stays in the browser
The complete IBAN is not required for the German bank lookup and is not stored by WebXtend.
Deterministic checks
Structure and checksum validation follow explicit rules rather than probabilistic classification.
Reference data stays replaceable
The lookup is a focused capability instead of becoming hard-coded into the surrounding application.
Where early IBAN validation can help
The solution is most useful when an existing web process already collects an IBAN and formal input errors cause measurable follow-up or failed processing.
Boundaries
What an IBAN check cannot prove
A valid checksum does not prove that an account exists, belongs to a particular person or can receive a specific payment. WebXtend therefore presents the result as formal validation and bank lookup, not as account ownership verification.
Questions about IBAN validation
Is the full IBAN sent to WebXtend?
For the German bank lookup, no. Structure and checksum are checked locally; only the derived eight-digit bank code is needed for the lookup.
Does a valid IBAN guarantee that the account exists?
No. Formal IBAN validation verifies the identifier format and checksum. It does not establish account existence or ownership.
Can this be added to an existing form?
Yes. The purpose of the solution is to add the validation capability to fields that already exist without replacing the form.
Can the existing backend still validate the IBAN?
Yes — and authoritative backend checks should remain where the underlying transaction requires them. WebXtend provides earlier user-facing feedback.
Want to catch IBAN errors before submit?
Show us the existing field and the current correction path. We can check whether browser-side validation and bank lookup fit the process.