EncadenaVerifactu for WooCommerce. Chained, hashed invoice records, the tax QR code and AEAT submission for Spanish stores.
Encadena is a WordPress plugin that applies Spain's Verifactu invoicing rules to WooCommerce: invoice numbering, chained and hashed billing records, the tax QR code on invoices and emails, rectifying invoices for refunds, submission to the AEAT with your own certificate, and an export for your accountant.
- WordPress
- WooCommerce
- 14-day store credit
- Secure checkout by Stripe
- License, updates and support for a year
Every plan includes
- The BankBridge plugin for the sites on your plan
- Plugin updates for one year
- Support from our team for one year
- Move your license between sites from your account
- Return within 14 days for full store credit
Features
What Encadena does
Grouped by job: invoicing, records, aeat, setup, checkout.
Invoicing
Invoices and simplified invoices from WooCommerce orders
An invoice is issued when an order is paid (or at the order status you choose). With a valid customer NIF it is a full invoice (F1); without one, a simplified invoice (F2) up to the limit you set. Each series restarts every year.
Records
Chained, hashed billing records
Every invoice, rectifying invoice and annulment creates a billing record with a SHA-256 huella that includes the huella of the previous record, as Orden HAC/1177/2024 art. 13 and the AEAT hash specification describe. Our tests reproduce the AEAT's published hash examples exactly.
Records
Records that are never edited
Records are stored in insert-only tables. A mistake is fixed with a new record (a correction, a rectifying invoice or an annulment), never by changing the old one. A full chain check finds edits made directly in the database.
Invoicing
Tax QR code and VERI*FACTU legend
Invoices, order emails and the customer's account page show the text "QR tributario:", a 35 x 35 mm QR code with error correction level M and, in VERI*FACTU mode, the VERI*FACTU legend (Orden HAC/1177/2024 arts. 20 and 21).
Invoicing
Invoice PDF
A built-in PDF invoice with the QR code at the top, attached to customer emails and downloadable from My Account and the order screen.
Invoicing
Refunds become rectifying invoices
A WooCommerce refund issues a rectifying invoice by differences (R1, or R5 for a simplified invoice) linked to the original. An annulment record is available for invoices issued by mistake.
AEAT
Submission to the AEAT with your certificate
In VERI*FACTU mode records are sent to the AEAT web service in order, up to 1,000 per message, respecting the wait time the AEAT returns, with automatic retries at least every hour after a technical failure.
AEAT
Clear statuses and fixes
Each record shows its AEAT status and CSV. Rejected records show the AEAT error code, a plain explanation and a button to create the correction record.
Setup
VERI*FACTU or NO VERI*FACTU
Choose between sending records as they are created, or keeping them signed (XAdES) on your site with a chained event register and a summary every six hours.
Checkout
NIF field at checkout
An optional NIF / VAT ID field in the classic and block checkout, with check-character validation for NIF, NIE and CIF and a format check for EU VAT numbers.
Records
Export for your accountant
Download a period as CSV (one row per record, base and tax per VAT rate) or as XML with the records exactly as stored.
Setup
Offline simulator for testing
Try the whole flow in a test environment with an offline simulator that never contacts the AEAT, then move to the AEAT test portal with your certificate.
Use cases
How sites use it, by integration
- WooCommerce
A WooCommerce shop selling to consumers in Spain
Most orders become simplified invoices automatically. Customers who type a NIF at checkout get a full invoice.
How it works with WooCommerce: A WooCommerce shop selling to consumers in Spain - WooCommerce
A B2B store that needs full invoices
Customers enter their NIF or EU VAT number at checkout. Orders above your simplified-invoice limit wait for the customer's tax ID instead of producing an invoice the AEAT would reject.
How it works with WooCommerce: A B2B store that needs full invoices - WooCommerce
Returns and partial refunds
Each refund produces a rectifying invoice linked to the original, with its own QR code and record.
How it works with WooCommerce: Returns and partial refunds - WordPress
Monthly hand-off to the gestor
Export the month as CSV for the accountant, or as XML for archiving.
Encadena is Verifactu for WooCommerce. It turns your WooCommerce orders into invoices and simplified invoices, creates the chained billing record that Spain's Verifactu rules require for each one, prints the tax QR code on the invoice, and sends the records to the Spanish tax agency (AEAT) with your own electronic certificate.
The AEAT does not certify invoicing software. Encadena's producer signs a declaración responsable, which you can read inside the plugin. It is still a draft: see the notes at the end of this page.
What is Verifactu?#
Verifactu is the common name for the rules in Real Decreto 1007/2023, which set what invoicing software used by businesses and self-employed people in Spain must do (BOE-A-2023-24840 (opens in a new tab), checked October 24, 2026). The technical details are in Orden HAC/1177/2024 (BOE-A-2024-22138 (opens in a new tab)) and in the AEAT's technical documents.
In short, the software must:
- create a billing record for each invoice and each annulment, at the moment the invoice is issued (RD 1007/2023 arts. 9 to 11);
- chain each record to the previous one with a hash, the huella (RD 1007/2023 art. 12; Orden art. 13);
- never let a record be changed without detection (RD 1007/2023 art. 8);
- print a QR code on every invoice, and the VERI*FACTU legend when records are sent to the AEAT (RD 1619/2012 art. 6.5, added by RD 1007/2023; Orden arts. 20 and 21);
- either send every record to the AEAT (VERIFACTU mode) or sign them and keep an event register (NO VERIFACTU mode) (RD 1007/2023 arts. 8, 12 and 16).
When does it apply?#
| Who | Date in force on October 24, 2026 | Source |
|---|---|---|
| Companies that pay corporate income tax (Impuesto sobre Sociedades) | 1 January 2027 | Real Decreto-ley 15/2025, BOE-A-2025-24446 (opens in a new tab) |
| Everyone else in scope (including the self-employed) | 1 July 2027 | Same |
Congress validated Real Decreto-ley 15/2025 on 11 December 2025 (BOE-A-2025-25695 (opens in a new tab)). On 5 October 2026 the Ministry of Finance announced that it plans to postpone the pending obligations to October 2028 (press note (opens in a new tab)). On October 24, 2026 that change had not been published in the BOE. Check the current dates with your adviser.
What does Encadena do?#
| Step in WooCommerce | What Encadena does |
|---|---|
| Customer types a NIF at checkout (optional) | Checks the NIF, NIE or CIF check character, or the EU VAT number format |
| Order is paid | Issues a full invoice (F1) or a simplified invoice (F2), creates the chained record, the QR code and the PDF |
| Order total above your simplified-invoice limit and no NIF | Holds the invoice until you add the customer's tax ID |
| Refund | Issues a rectifying invoice (R1 or R5) linked to the original |
| Invoice issued by mistake | Creates an annulment record (anulación) |
| Every minute | Sends waiting records to the AEAT, respecting its wait time (VERI*FACTU mode) |
| Every day | Checks the whole chain and raises an alarm if anything is wrong |
Which mode should I use?#
| VERI*FACTU | NO VERI*FACTU | |
|---|---|---|
| Records sent to the AEAT | Every record, right away | Only if the AEAT asks for them |
| Electronic signature of each record | Not needed (RD 1007/2023 art. 16.3) | Required (XAdES, Orden art. 14) |
| Event register | Not needed | Required, with a summary every 6 hours (Orden art. 9) |
| Legend on invoices | VERI*FACTU | None |
| Leaving the mode | Only from the next calendar year (RD 1007/2023 art. 16.5) | Any time |
Most shops will find VERI*FACTU simpler. See VERIFACTU vs NO VERIFACTU.
How do I try it?#
Open the demo at demo.pluginloom.com/verifactu. It uses a fictitious issuer, the test environment and the offline simulator, so nothing is sent to the AEAT.
On your own site:
- Install Encadena and run the setup wizard. It asks whether Verifactu applies to you, your tax details and the mode.
- Test with the offline simulator: place an order, mark it paid, refund part of it, and look at the records.
- Upload your electronic certificate and try the AEAT test portal.
- Agree the series, the simplified-invoice limit and the treatment of untaxed lines with your adviser.
- Switch to production when the producer's declaración responsable is signed.
What you should know before buying#
- The AEAT does not certify software. The producer signs a declaración responsable (RD 1007/2023 art. 13; Orden HAC/1177/2024 art. 15). Encadena's is a draft pending the producer's details and signature, and the production environment stays locked until it is signed.
- The producer carries legal liability. The General Tax Law sets penalties of 150,000 EUR per year and per type of system for producers whose software does not meet the rules, and 50,000 EUR per year for users of non-compliant systems (Ley 58/2003 art. 201 bis, BOE-A-2003-23186 (opens in a new tab), checked October 24, 2026).
- You need your own electronic certificate. The plugin cannot get one for you.
- A live test on the AEAT test portal is still pending, because it needs a real certificate. The engine is tested against the AEAT's published hash examples, its signed sample record, its QR examples and its official XML schemas.
- Out of scope: the Basque Country and Navarra (foral systems), SII taxpayers, orders in currencies other than the euro.
- Ask your adviser about your simplified-invoice limit, special regimes such as recargo de equivalencia, and how untaxed lines should be declared.
Last updated October 24, 2026.
Compare
Encadena vs building it yourself
| What you need | Encadena | Build it yourself | AEAT free invoicing app |
|---|---|---|---|
| Invoices created from WooCommerce orders | Yes, automatically | You build it | No, invoices are typed in by hand |
| Chained SHA-256 records and QR code | Included | You implement the AEAT specifications | Included |
| Refunds as rectifying invoices | Automatic from WooCommerce refunds | You build it | Typed in by hand |
| Submission to the AEAT | Included, with your certificate | You build the SOAP client, flow control and retries | Done by the app |
| NIF field and validation at checkout | Classic and block checkout | You build it | Not applicable |
| Declaración responsable of the producer | Provided by the producer (draft, pending signature) | You become the producer and must sign one | Not needed (AEAT's own app) |
| Updates when the AEAT changes its specifications | Included for a year with your license | Your developer's time | Done by the AEAT |
Compatibility
Requirements
Check these before you buy. If you are unsure about your setup, ask us first.
| Works with | WordPress, WooCommerce |
|---|---|
| Requires WordPress | 6.0 or newer |
| Requires PHP | 7.4 or newer |
| Tested up to | WordPress 6.9 |
| WordPress | 6.0 or newer (6.9 or newer recommended) |
| PHP | 7.4 or newer, with the dom, openssl and curl extensions (8.3 recommended) |
| WooCommerce | 8.9 or newer. Works with HPOS order storage and with both the classic and the block checkout |
| Currency | Orders in euros only |
| Electronic certificate | Required to send records to the AEAT or to sign them: a qualified certificate of your business, or of someone authorised to act for it. You get it from a certification authority such as FNMT |
| Tax territory | Businesses taxed under the common Spanish system. Not for the Basque Country or Navarra (foral systems) or for SII taxpayers |
Changelog
Every release, in the open
1.0.3Oct 24, 2026
Accessibility release (WCAG 2.2 AA pass, UI kit 1.1.1): form field borders at 3:1 or better, warning text 5:1, screens reflow at 320px, 24px toast close buttons, error toasts stay until dismissed, confirm dialogs described by their message, focus never hidden behind the sticky Save bar, screen titles name Encadena, Spanish legal texts marked lang=es, invoice PDF declares its language and title (still untagged; HTML block and CSV export are the accessible alternatives). No change to invoicing or AEAT logic.
1.0.2Oct 24, 2026
Layout fixes on phones and narrow screens, consistent form controls, accessibility improvements.
1.0.1Oct 24, 2026
Admin and invoice design now matches the PluginLoom family. Accessibility fixes.
Our promises
14-day store credit
If Encadena is not right for you, return it within 14 days for store credit worth the full amount you paid, to spend on any PluginLoom product within 12 months.
Read the store credit policySupport by ticket, in your account
Open a ticket from your account. Your license and site details are attached, so you do not repeat yourself.
Visit supportGPL code, license for updates
The plugin code is GPL. Your license key turns on updates and support for the year.
Read the license terms
FAQ
Encadena questions, answered
What is Encadena?
A WordPress plugin that applies Spain's Verifactu rules for invoicing software (Real Decreto 1007/2023) to WooCommerce orders: numbering, chained billing records, the tax QR code, rectifying invoices and submission to the AEAT.
Is Encadena certified or approved by the AEAT?
No. The AEAT does not certify invoicing software. The law asks the software producer to sign a declaración responsable (RD 1007/2023 art. 13; Orden HAC/1177/2024 art. 15). Encadena's declaración is shown inside the plugin as a draft until the producer, Four Cents, confirms its details and signs it. Until then the production environment stays locked.
When does Verifactu start?
On 24 October 2026 the dates in force are 1 January 2027 for corporate income tax payers and 1 July 2027 for everyone else (Real Decreto-ley 15/2025, validated by Congress on 11 December 2025). On 5 October 2026 the Ministry of Finance announced a plan to postpone them to October 2028; that change was not law on 24 October 2026. Check the current dates with your adviser.
Do I need an electronic certificate?
Yes, to send records to the AEAT (VERI*FACTU) or to sign them (NO VERI*FACTU). It must be a qualified certificate of your business or of someone authorised to act for it (Orden HAC/1177/2024 arts. 5 and 14). You get it from a certification authority such as FNMT; the plugin cannot get one for you. You can test everything before that with the offline simulator.
Has Encadena been tested against the AEAT's test portal?
Not yet. The AEAT test web service needs a real electronic certificate, which we do not hold. The submission client is tested against the AEAT's official XML schemas and published examples, and against an offline simulator. A live test on the AEAT test portal is pending a certificate.
Does it work in the Basque Country, Navarra or for SII taxpayers?
No. Businesses under the foral systems of the Basque Country (TicketBAI) or Navarra, and taxpayers who keep their VAT books through SII, are outside Verifactu (RD 1007/2023 arts. 1.3 and 3.3). Canary Islands, Ceuta and Melilla businesses are in scope; you can choose IGIC or IPSI in the settings.
What about recargo de equivalencia or special VAT regimes?
You can set the regime key, but the tax breakdown comes from the taxes stored on each WooCommerce order. Recargo de equivalencia amounts are not added automatically. Ask your adviser before using Encadena under a special regime.
Does it support other currencies?
No. Only orders in euros are invoiced; others are held with a note on the order. RD 1007/2023 art. 10.2 asks for amounts in euros.
Can I try it?
Yes. The demo at https://demo.pluginloom.com/verifactu/ shows sample invoices with their QR codes, PDFs and record chain, using a fictitious issuer and the offline simulator.
What happens to my records if I uninstall the plugin?
They stay. Billing and event records must be kept for the legal period even after changing software (Orden HAC/1177/2024 art. 8.3), so uninstalling only removes settings, the certificate and the activity log. Export your records first.
What if it is not right for me?
Within 14 days of purchase you can return a license for store credit worth the full amount you paid, to spend on any PluginLoom product within 12 months. Returning a license revokes it. Where the law gives you a right to a money refund, such as for a faulty product, we refund your payment. See the store credit policy for details.
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