Strainovic UID Check Schweiz

Business customers enter their Swiss business identification number (UID, in German "Unternehmens-Identifikationsnummer") in the checkout or in a quote form. Strainovic UID Check Schweiz validates it before the order or request goes through:

• Format and check digit instantly, without a network request (CHE-123.456.789, also without separators or with the suffix MWST/TVA/IVA)
• Existence in the UID register of the Swiss Federal Statistical Office
• Status: deleted or unknown companies are rejected with a clear message in the form
• Consistent format in the order (CHE-123.456.789)
• If the UID register is unreachable, the order is not blocked as long as the check digit is correct
• Results are cached for one day in the checkout, so each UID is requested at most once per day there

WooCommerce: the plugin adds an optional "UID" field to the checkout, both to the Checkout block (default since WooCommerce 8.3, contact section, saved to the customer account) and to the classic shortcode checkout (after the company name). If filled in, it is validated. Contact Form 7: every text field named uid is validated, for example [text uid placeholder "CHE-123.456.789"], or [text* uid] for a required field. For developers: during a Contact Form 7 submission, other plugins (for example a connector that sends the inquiry to a CRM) get the check result with apply_filters( 'strainovic_uid_check_schweiz_cf7_report', null ). It returns null (no or empty UID field) or an array with the keys uid (CHE-123.456.789), status (active, deleted, not_listed or unverified when the register was unreachable), register_reached, checked_at (ISO 8601, UTC) and company (null or name, legal_form as eCH-0097 code, street, postcode, city, canton, vat_registered), taken from the register at the time of the submission. Languages: English, German (Germany and Switzerland), French and Italian are included. The field label and the error messages follow the language of the site, with the Swiss terms UID, IDE (French) and IDI (Italian). German variants such as de_CH_informal or de_AT, and French or Italian variants such as fr_CA or it_CH, use the matching bundled translation. Pro version (in preparation): fill in company name, legal form and address automatically from the register, show the VAT status, allow invoice payment only for valid companies, alert when a customer company is deleted. More at https://www.strainovic-it.ch/uid-check/

0.3.0

• Contact Form 7: the check result of a submission is available to other plugins through the filter strainovic_uid_check_schweiz_cf7_report (UID, status, check time and company data from the register).
• Contact Form 7 submissions always ask the UID register instead of the one-day cache, so the result passed on is current.

0.2.2

• Donation link on the plugins page.

0.2.1

• Renamed to "Strainovic UID Check Schweiz" with the slug and text domain strainovic-uid-check-schweiz; the Checkout block field is now strainovic-uid-check-schweiz/uid.
• The "External services" section describes in detail which data is sent to the UID register and when.

0.2.0

• Translations: English source texts, bundled German (de_DE, de_CH), French and Italian translations for the checkout field and all error messages.

0.1.1

• Checkout block support via the additional checkout fields API; the UID is validated on the Store API and saved to the order in a consistent format.

0.1.0

• First release: UID validation in WooCommerce checkout and Contact Form 7.