> For the complete documentation index, see [llms.txt](https://docs.eximee.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.eximee.com/documentation/documentation-en/budowanie-aplikacji/interfejs-uzytkownika/formularze/praca-z-komponentami-bazowymi/walidacja-wartosci-komponentow.md).

# Validating component values

Validation of component values in Eximee Designer allows control over the correctness of data entered in forms. Thanks to validations, we can ensure that all data sent to the system meets specific criteria (e.g. is complete and in the correct format), which prevents errors at later stages of the process. Eximee Designer allows attaching **standard validations** to form controls (components) — for example, a validator for a PESEL number, ID card number, or bank account number. **By default, validations are not active**, until they are configured, so the designer decides which fields require checking. Each validation is defined for a specific field — this allows an error message to be displayed directly next to that field if the conditions are not met.


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