Update, 20 Oct 2026: on 5 October 2026 the Spanish Ministry of Finance (Hacienda) announced, in an information note, the postponement of VeriFactu to October 2028, to align it with B2B e-invoicing (Order HAC/1028/2026). Until the amendment is published in the BOE (Spain's Official State Gazette), the legal dates remain 1 January 2027 (Corporate Tax) and 1 July 2027 (self-employed and the rest of obligated taxpayers). Sources: Hacienda information note (PDF, in Spanish) · elEconomista · The Objective. More detail in the question on the postponement to 2028.
Legal dates 1 Jan 2027 (Corporate Tax) and 1 Jul 2027 · Postponement to Oct 2028 announced, pending BOE publication
VeriFactu for A3: adapter for a3ERP and a3innuva
If you invoice with a3ERP, a3innuva ERP or a3factura by Wolters Kluwer, the software is already declared adapted to Spain's SIF Regulation. Dokuflex is the VeriFactu adapter for A3 that adds what the software does not do: an approval cycle before issuing, the 10-year legal archive with qualified time-stamping, and one and the same chained record, QR and AEAT submission for a3 and the rest of your group's systems. Without changing software.
Last reviewed: 20 October 2026·Reviewed by the Dokuflex Compliance team
Dokuflex Compliance team — AEAT-approved for certified digitisation (Doku4Invoices, Resolution of 24 October 2007), processing invoices for clients across banking, healthcare and retail. Contact: compliance@dokuflex.com.
No credit cardMeets SIF requirements (RD 1007/2023)a3 connection in 48hFrom €19/month · 10-year archive included
RD 1007
/2023 + Order HAC/1177/2024
48h
to production
10 years
archive included
What the regulation requires
What VeriFactu requires from a company invoicing with a3ERP, a3innuva or a3factura
Spain's RD 1007/2023 and Order HAC/1177/2024 regulate the billing information system (SIF) you issue invoices with. Every invoice and every receipt produced by a3ERP, a3innuva ERP or a3factura must generate an invoice record with a chained SHA-256 hash, carry the printed tax QR and, in VeriFactu mode, be submitted to the AEAT (Spain's tax agency) at the moment of issue (in non-VeriFactu mode, the record is signed with XAdES and kept). In addition, the taxpayer must keep the records and be able to hand them over on request.
Wolters Kluwer declares a3ERP, a3innuva ERP and a3factura adapted, and a3innuva lets you choose the mode from within the application. What the regulation requires can therefore already be covered by the software. The decisions left to the company are different ones: which issuing points exist besides a3 (a POS in a store, a sales-rep app, another group entity running SAP or Sage), whether each invoice must go through an approval before the record is generated, and where the invoices and their evidence are kept for 10 years. That is where the adapter comes in.
Penalties: Spain's Law 11/2021 (art. 201 bis LGT, the General Tax Act) provides fines of up to €50,000 per fiscal year for using non-certified billing software. General guidance based on official sources: for your specific case, consult your tax advisor. The overview of the adapter for all ERPs is on the VeriFactu adapter for SAP, Sage, A3 and Holded page.
Complement, not replacement
What a3 already covers and what the Dokuflex VeriFactu adapter adds
If you only invoice from a3 and need nothing else, activate the software's adaptation with your Wolters Kluwer partner. Dokuflex makes sense when the invoicing cycle is more than the software.
Need
a3ERP / a3innuva / a3factura
Dokuflex VeriFactu adapter
Chained record, QR and AEAT submission for what a3 invoices
Yes, per Wolters Kluwer's declaration; a3innuva picks the mode from within the application
Yes, reading the issued invoices via CSV, XML or API, without touching the software
Approval and signature before issuing the invoice
Out of the invoicing software's scope
BPMN process with validation, approval and electronic signature; the record is generated when the workflow completes
Other issuing points (POS, sales-rep app, another entity on SAP or Sage)
Only covers what is invoiced from a3
One adapter for a3, SAP, Sage, Holded, Dynamics, POS and custom systems
10-year legal archive
Retention according to the software and its configuration
Included, with qualified time-stamping and the evidence of every approval
VeriFactu / non-VeriFactu mode
Depends on product and configuration
Switch between modes from the console, with no migration
Supplier invoices (what you receive)
Out of VeriFactu's scope
AI OCR and certified digitisation in AEAT invoice management
a3ERP, a3innuva and a3factura are trademarks of Wolters Kluwer. Adaptation status per the vendor's public information as of October 2026; confirm it with your partner. For the invoices you receive, see AEAT invoice management with OCR.
How it works
How the VeriFactu adapter works with a3 in 3 steps
Your team keeps invoicing in a3 exactly as before. Dokuflex does the rest.
1
Sign up and provide the certificate
Create your account in 30 seconds. Register the Spanish tax ID (CIF) of each obligated entity and its electronic certificate.
2
Connect a3
Dokuflex reads the invoices issued in a3ERP, a3innuva or a3factura via CSV, XML or API connector. If the invoice must be approved first, the BPMN workflow is designed with clicks, no coding.
3
Comply automatically
Every invoice receives the chained SHA-256 hash, the XAdES signature and the tax QR, is submitted to the AEAT with automatic retries and is kept for 10 years with qualified time-stamping.
When the VeriFactu adapter makes sense in the a3 ecosystem
Three situations that keep coming up in SMEs and accounting firms working with a3, and what Dokuflex solves in each one.
The invoice needs approval before it goes out
Certified construction work, milestone-based services, invoicing to public administrations: someone must validate the amount and the supporting documents before issuing. In Dokuflex the approval is a task in the BPMN process, with signature where applicable, and the chained record is generated at the end; every step is audited.
a3 in one entity, SAP or Sage in another
Groups that grew through acquisitions and keep a3ERP in one subsidiary, Sage in another and a POS in the store. A single VeriFactu adapter covers every issuing point with the same record, the same legal archive and the same console, instead of three solutions to maintain.
Tie VeriFactu into the document workflow
The invoice issued in a3 must end up next to the contract, the delivery note and the approval evidence, kept for 10 years with qualified time-stamping and findable in an inspection. Dokuflex stores the invoice, its record and its context in the same case file.
VeriFactu calendar for companies running a3 (Royal Decree-Law 15/2025)
RD 254/2025 first moved the dates set by RD 1007/2023 to 2026, and Royal Decree-Law 15/2025 of 2 December postponed them to 2027. These are the dates in force in the BOE, plus the October 2026 announcement that does not yet amend them:
29 JUL
29 July 2025
Software vendors may only commercialise Billing Information Systems (SIF) certified under the VeriFactu rules.
1 JAN
1 January 2027
Mandatory for entities subject to Spanish Corporate Tax (sociedades mercantiles and other legal persons liable for IS).
1 JUL
1 July 2027
Mandatory for self-employed workers and the rest of obligated taxpayers: the usual profile of a3factura and of many accounting-firm clients.
5 OCT
5 October 2026 — postponement to October 2028 announced
Information note from the Spanish Ministry of Finance: planned postponement of VeriFactu to October 2028, to align it with B2B e-invoicing (Order HAC/1028/2026). Not published in the BOE as of 20 Oct 2026: until RD 1007/2023 is amended, the 2027 dates apply.
6 OCT
6 October 2027 and 6 October 2028 — B2B e-invoicing
Order HAC/1028/2026, in force since 6 October 2026, gives companies with a turnover above 8 million euros 12 months, and all others 24 months, to issue and receive invoices in a structured format. It is a separate obligation from VeriFactu, with its own calendar.
What changes in practice
a3 remains your invoicing software. Dokuflex adds the prior approval, the chaining, the QR, the AEAT submission and the 10-year archive, for a3 and for the rest of your group's systems.
Compliant with RD 1007/2023 and Order HAC/1177/2024, live in 48h, with the 10-year archive included.
Frequently asked questions
VeriFactu and a3: what we get asked most
Do a3ERP and a3innuva already comply with VeriFactu?
According to Wolters Kluwer, a3ERP, a3innuva ERP and a3factura are adapted to Spain's SIF Regulation, and a3innuva lets you choose VeriFactu or non-VeriFactu mode from within the application. If all your invoicing comes out of there and you need nothing else, it is enough to activate it and apply the configuration your partner indicates. Dokuflex comes in when you also want an approval cycle before issuing, the 10-year legal archive with qualified time-stamping, or a single adapter for a3 and the other systems in the group.
Which a3 products does the adapter cover?
The integrations published on the platform are A3 ERP, A3 Nom and A3 Asesor by Wolters Kluwer. For the rest of the a3 ecosystem (a3innuva, a3factura, a3ECO and other modules), the adapter works as with any other invoicing system: it reads the issued invoices via CSV, XML or API export. The specific versions of your installation are confirmed in the demo before starting.
Do I have to leave a3 to comply with VeriFactu?
No. Dokuflex is a complement, not a replacement: your team keeps invoicing in a3ERP or a3innuva as before and the adapter adds the record with chained SHA-256 hash, the XAdES signature, the tax QR and the AEAT submission without touching the software or retraining the finance team. If a submission fails, it is retried automatically and nothing is duplicated.
Can I approve each invoice before the invoice record is generated?
Yes. It is the most common case in the a3 ecosystem: the invoice goes through a BPMN process of validation, approval and, where applicable, electronic signature, and the chained record is generated when the workflow completes, not before. Every step leaves a trace of who approved what, and the invoice is kept in the 10-year legal archive together with its evidence.
When does VeriFactu become mandatory for my company?
The legal dates in force, set by Spain's Royal Decree-Law 15/2025 of 2 December (RD 254/2025 had previously moved them to 2026), are 1 January 2027 for entities subject to Corporate Tax and 1 July 2027 for self-employed workers and the rest of obligated taxpayers. On 5 October 2026 the Spanish Ministry of Finance announced a postponement to October 2028, but as of 20 October 2026 that amendment has not been published in the BOE. Since 29 July 2025 software vendors may only commercialise certified software.
Has VeriFactu been postponed to October 2028?
The Spanish Ministry of Finance announced it on 5 October 2026 in an information note, to align it with B2B e-invoicing (Order HAC/1028/2026). Until the amendment of RD 1007/2023 is published in the BOE, the dates in force remain 1 January 2027 and 1 July 2027. The technical requirements (chained record, hash, QR and AEAT submission) do not change, so whatever you adapt now remains valid: it makes sense to continue the pilot without a last-quarter rush.
We run a3 in one entity and SAP or Sage in another. Do we need one adapter per system?
No. Dokuflex connects to each issuing system with its own connector (a3 in a subsidiary, SAP at headquarters, Sage or Holded in another entity, a POS in a store) and applies the same chained record, QR and AEAT submission to all of them. It is designed for groups that want to cover entities running different ERPs without ending up with three VeriFactu solutions to maintain.
How long does it take and how much does VeriFactu for A3 cost with Dokuflex?
The connection to the software is ready in 24-48 hours and invoices are submitted to the AEAT the same day. You can start free, no credit card; plans start at €19 per month depending on invoice volume, with the 10-year legal archive included.
Comply with VeriFactu on a3 this week
Connect your a3ERP or a3innuva and submit to the AEAT within 48 hours. No credit card, no software change.
