by rakuzy 0 (0 reviews)

Yzukar B2B Invoice Fields for KSeF

Name: Yzukar B2B Invoice Fields for KSeF
Author: rakuzy

Collect the Polish NIP and B2B invoice data at checkout, validate the NIP checksum locally, export orders to CSV. Classic and block checkout.

Yzukar B2B Invoice Fields for KSeF ranks #55,170 among WordPress.org plugins with 0+ active installations, is #10,113 of 14,124 in the E-commerce category, and was last updated Sep 2, 2026. Data from WordPress.org, refreshed twice daily — see methodology.

Compatible with WP 7.1.4

v0.4.0 Current Version v0.4.0

Updated 2 months ago Last Update on 02 Sep, 2026

Refreshed 1 week ago Last Refreshed on

#10,113 of 14,124 in E-commerce

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Rank

#55,170

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Active Installs

-100%

KW Avg Position

7.4

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Downloads

372

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Support Resolved

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0 (0 reviews)

Next Milestone 10

Total Progress 30%

0+ 10+

27,602

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8,000,000

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Plugin Details

Version: 0.4.0
Last Updated: Sep 02, 2026
Requires WP: 6.3+
Tested Up To: 7.1.4
PHP Version: 7.4 or higher
Author: rakuzy

Support & Rating

Rating: ☆ ☆ ☆ ☆ ☆ 0
Reviews: 0
Support Threads: 0
Resolved: 0%

Keywords

e-faktura faktura faktura b2b ksef nip

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Frequently Asked Questions

Common questions about Yzukar B2B Invoice Fields for KSeF

Yes, since version 0.3.0. The fields are registered through the official WooCommerce Additional Checkout Fields API and appear in the additional order information block. The plugin also declares compatibility with the cart_checkout_blocks feature, so WooCommerce no longer shows an incompatibility warning. The classic checkout is unchanged, and both paths save the same order data.

In the additional order information block, below the address fields. Validation is identical to the classic checkout: ticking "I need a company invoice" requires a NIP, the NIP must pass the checksum test, and if you require a company name in the settings, it must be filled in.

Yes. Whether the order came from the classic or the block checkout, the NIP, the invoice request, the e-invoice email and the validation status end up in the same order fields. The NIP column in the order list and the CSV export do not distinguish the source.

No. Zero external requests, no SDK, no telemetry. The NIP is validated locally and the data stays in your own store database. The links on the plugin screen (the paid add-on and the free readiness pack) are plain links: they carry a marker telling us which screen they were clicked from, they carry nothing about you, and they open only when you click them.

No. It does not connect to KSeF, issue invoices, generate FA(3) XML, authenticate with certificates, or download official confirmations. It only helps collect and export invoice-related order data before it reaches your invoicing software or accounting office.

No. The free plugin validates the 10-digit Polish NIP format and checksum locally. It does not verify VAT status or bank account assignment on the official whitelist.

WordPress 6.3 or newer, PHP 7.4 or newer, and WooCommerce 8.9 or newer. The plugin declares compatibility with HPOS (High-Performance Order Storage) and with the block checkout. WooCommerce 8.9 is the release that introduced the Additional Checkout Fields API the block checkout support is built on; below it the block checkout would silently show no invoice fields, so the plugin declares that floor instead.

A separate ZIP hosted on the plugin's landing page, downloaded only if you click the link. It holds a spreadsheet workbook with an FA(3) field map, a printable KSeF checklist and starter CSV templates for an invoice register and a contractor NIP list. The documents are in Polish. It is planning material, not an invoicing tool, and nothing in the plugin depends on it.

Yes. The free plugin is fully usable on its own for collecting and exporting invoice fields, and nothing here is time-limited or locked behind a trial. A separate paid add-on, distributed outside WordPress.org, adds saved export profiles, XLSX export with FA(3) field mapping, and bulk actions.

The trial covers the paid add-on only, never this plugin: everything the free plugin does stays free and unlimited whether you start a trial or not. It runs for 14 days, starts without a card or PayPal details, and expires on its own if you do nothing, so nothing can be charged automatically. The link is a plain link on the plugin's own screen and it opens only when you click it.