Ah I see that Validity check is done by this part, I have absolutely no clue how to use it 😂 Would it be an option to enhance the umb-property element with a simple IsValid and ValidationMessage properties? Data is validated Server SIde anyway if ('checkValidity' in this._element) { this.#controlValidator = new UmbFormControlValidator(this, this._element as any, this.#dataPath); // We trust blindly that the dataPath is available at this stage. [NL] if (this.#dataPath) { this.#validationMessageBinder = new UmbBindValidationMessageToFormControl( this, this._element as any, this.#dataPath, ); this.#validationMessageBinder.value = this.#propertyContext.getValue(); } }