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Look up your question: invoices, Verifactu, tenders, grants. Every answer comes from a guide, so you can keep reading if you want more; and, at the end, everything you can do, feature by feature, with its link.

Invoices, Verifactu and tax deadlines

Is Verifactu mandatory in 2026?

No. Real Decreto-ley 15/2025 postponed the obligation: 1 January 2027 for companies and 1 July 2027 for the self-employed. 2026 is the year to prepare.

From the guide Verifactu: 2026-2027 guide with the real calendar (Royal Decree-law 15/2025)

Are Verifactu and the Crea y Crece electronic invoice the same thing?

No. Verifactu (Real Decreto 1007/2023) regulates how your invoicing software must behave towards the tax authority. The B2B electronic invoice (Ley 18/2022, Crea y Crece) regulates the exchange of structured invoices between companies, with its own calendar still pending a regulation.

From the guide Verifactu: 2026-2027 guide with the real calendar (Royal Decree-law 15/2025)

Can I keep invoicing with Excel or Word?

If that is your usual invoicing system, from your obligation date it will not be compliant: it cannot guarantee tamper-proof records or a chained hash. If you use no computer invoicing system, you are outside the scope.

From the guide Verifactu: 2026-2027 guide with the real calendar (Royal Decree-law 15/2025)

And what almost no guide mentions: the invoices you RECEIVE

Verifactu is always explained from the issuer's side, and that is only half of it. From 2027, every invoice that reaches you from a Spanish supplier will carry a tax QR code with four data points: their tax ID (NIF), the invoice number, the date and the total amount. That QR is not decoration: it is a URL to the Agencia Tributaria website, and the check is PUBLIC: you need no Cl@ve or certificate to ask whether that invoice is on record.

From the guide Verifactu: 2026-2027 guide with the real calendar (Royal Decree-law 15/2025)

The check nobody does, and it is free

Everybody scans the QR with their phone, one at a time, to see whether the tax authority has the invoice on record. That is fine, and it is a different thing. What almost nobody does is the PRIOR check: does what the QR declares match what the invoice says? If the paper says €1,210 and the QR declares €1,150, something is wrong, and you can see it without calling anyone. For anyone who handles accounts payable, this is what to look at BEFORE paying. Here you can do it with one invoice or with thirty at once, and the ones that do not match come out at the top.

From the guide Verifactu: 2026-2027 guide with the real calendar (Royal Decree-law 15/2025)

«Not found» does not always mean fraud

This is the misunderstanding that will cause arguments with honest suppliers, and almost nobody explains it. Verifactu has TWO modes. In the automatic submission mode, which is the one properly called Verifactu, every invoice is registered with the tax authority when issued, and the check confirms it is on record. In the other, the «No-Verifactu» mode, the records are kept in the issuer's system and are NOT sent automatically: the check cannot confirm that invoice, and that is normal. Before accusing anyone, find out which mode they invoice under. And here is what matters for the recipient: for those invoices, comparing the QR with the paper is the ONLY check that exists, because the tax authority can say nothing.

From the guide Verifactu: 2026-2027 guide with the real calendar (Royal Decree-law 15/2025)

If you pay tax in a foral territory, this is not for you

What decides which system applies to you is YOUR tax domicile, not your customers'. In Álava, Bizkaia and Gipuzkoa TicketBAI applies, not Verifactu, and they are incompatible: you cannot use one instead of the other. Navarra also has its own regime. Our QR checker recognises both, and also the Portuguese AT code, because an Iberian tax adviser receives invoices from all three.

From the guide Verifactu: 2026-2027 guide with the real calendar (Royal Decree-law 15/2025)

Can I send the Facturae that PAPYR generates to FACe?

Yes, once it is signed. The XML is generated validated against the 3.2.2 schema and FACe also requires an XAdES signature with a certificate: sign it with your company certificate at /licitaciones/firmar, where AutoFirma signs it in Facturae format on your computer (the invoice does not pass through our server). Without that signature, FACe rejects it.

From the guide Electronic invoicing in Spain: Facturae, FACe, Crea y Crece and Verifactu, without mixing them up

Is B2B electronic invoicing already mandatory?

No. The Ley Crea y Crece is approved, but the effective obligation depends on its implementing regulation, still pending. When it is published, the deadlines will run by company size.

From the guide Electronic invoicing in Spain: Facturae, FACe, Crea y Crece and Verifactu, without mixing them up

Which Facturae version does PAPYR validate?

3.2, 3.2.1 and 3.2.2 against the official schema, with a check of the tax IDs (NIF/CIF) of the parties and that bases, VAT and totals add up. And the XAdES signature, checked: that the invoice has not changed since it was signed, who signed it, and whether their certificate is qualified according to Spain's trusted list.

From the guide Electronic invoicing in Spain: Facturae, FACe, Crea y Crece and Verifactu, without mixing them up

Is the customer's NIF always mandatory?

When the customer is a company or professional, yes. For a private individual, only in some cases (for example, if they ask for it to exercise a tax right).

From the guide What an invoice must contain in Spain: the mandatory data (Real Decreto 1619/2012, art. 6)

Can I correct an invoice that has already been sent?

It is not modified: a corrective invoice is issued that refers to the original (RD 1619/2012, art. 15).

From the guide What an invoice must contain in Spain: the mandatory data (Real Decreto 1619/2012, art. 6)

Is a valid IBAN a safe IBAN?

No. «Valid» means it exists and is written correctly; the fraud uses valid accounts in other people's names.

From the guide How to tell whether an invoice is fake before paying it (the IBAN change fraud)

Does PAPYR store my suppliers' accounts?

Not on our server. The list lives in your browser and you can delete it whenever you like.

From the guide How to tell whether an invoice is fake before paying it (the IBAN change fraud)

Can a NIF with the correct letter be fake?

Yes. The letter confirms that the number has been transcribed correctly, not that it is assigned to a real person. For a census check, the procedure is with the AEAT.

From the guide Validating NIF, CIF and NIE: how the check letter works (and typical errors)

Does PAPYR store the NIFs I validate?

No. The check is a local calculation with the official table; nothing is stored or sent to third parties.

From the guide Validating NIF, CIF and NIE: how the check letter works (and typical errors)

Does it also validate batches?

To validate identifiers inside invoices, Facturae validation automatically checks the NIF of issuer and recipient. For mass batches in Excel, write to us: it is exactly the kind of case our API exists for.

From the guide Validating NIF, CIF and NIE: how the check letter works (and typical errors)

Do they apply to an invoice to a private individual?

Not under Ley 3/2004, which covers only companies, self-employed people and the Administration. With a consumer, the legal interest rate and whatever the contract says apply.

From the guide Late-payment interest 2026: the rate for each half-year and how it is calculated (Ley 3/2004)

Is interest calculated on the total including VAT?

On the amount owed, which is the one on the invoice: in practice, the total. It is the usual criterion of the courts.

From the guide Late-payment interest 2026: the rate for each half-year and how it is calculated (Ley 3/2004)

Do I have to give notice first to be entitled?

No. Interest accrues by itself from the due date (art. 5). Claiming it in writing serves to put it on record and for the monitorio.

From the guide Late-payment interest 2026: the rate for each half-year and how it is calculated (Ley 3/2004)

Is the 130 the same as the income tax return?

No: it is an advance. In the June return the real tax for the year is calculated and the four 130 payments are subtracted.

From the guide Modelo 130: who files it, how it is calculated and when (2026)

If I have not invoiced anything in a quarter, do I have to file?

Yes, if you are obliged: it is filed even if the result is zero.

From the guide Modelo 130: who files it, how it is calculated and when (2026)

Is there any reduction if I earn little?

Yes: if your net income in the previous year did not exceed €12,000, you can subtract a small fixed amount per quarter, greater the lower the income was. It goes in its own box on the form.

From the guide Modelo 130: who files it, how it is calculated and when (2026)

Does the client need to sign up?

No. They open the link, drop the documents and that is it.

From the guide How to collect your clients' documents every month (without chasing them on WhatsApp)

What happens if I lose the key?

Whatever is pending to be opened cannot be recovered: that is why the panel offers to save a copy of the key and load it in another browser. Your client can always send it again.

From the guide How to collect your clients' documents every month (without chasing them on WhatsApp)

Do the documents go through email?

No. Email only tells you that something new has arrived; the documents are opened from your panel.

From the guide How to collect your clients' documents every month (without chasing them on WhatsApp)

Is the pay register only for large companies?

No: it is mandatory for all companies with employees, regardless of size. The additional pay audit is for those with more than 50 people.

From the guide Mandatory pay register: how to build it from payslips (Real Decreto 902/2020)

Does PAPYR fill in the Ministry's official tool?

It generates the raw material: the Excel by items with their nature, ready to pivot and enter into the official tool. The final entry and the classification by jobs of equal value remain a human decision, as they should.

From the guide Mandatory pay register: how to build it from payslips (Real Decreto 902/2020)

Is it safe to upload payslips?

Payslips are processed on EU servers, OCR is local, only the text is processed, with the detected identifiers (ID number, IBAN, phone…) replaced by markers, and everything is discarded when the response is returned. There is no file cloud: we store nothing.

From the guide Mandatory pay register: how to build it from payslips (Real Decreto 902/2020)

Public tenders

What happens if I put the price in envelope B?

It can exclude you: the central tribunal has confirmed it several times (TACRC 1483/2022, 81/2026). The exclusion is not automatic if the information does not reveal the bid, but it is a risk not worth taking.

From the guide What goes in each envelope of a public tender: A, B and C (and when there are one or two)

Can envelope A contain amounts?

Yes, those of solvency: turnover, insurance, guarantees. What it cannot contain is anything from your financial offer.

From the guide What goes in each envelope of a public tender: A, B and C (and when there are one or two)

What is the ROLECE and when do I need it?

The State's official register of bidders. In the simplified open procedure you must be registered (or have applied) before the deadline ends; it cannot be remedied afterwards.

From the guide What goes in each envelope of a public tender: A, B and C (and when there are one or two)

Can an error in the bid be remedied?

What already existed when the deadline ended can be clarified or completed (art. 141.2 LCSP), within three days. What cannot be done is change the bid: a wrongly written price or a proposal that is too long cannot be fixed afterwards.

From the guide The most frequent causes of exclusion in public tenders, with the ruling that confirms each

Is it worth appealing an exclusion?

It depends on the specifications and the cause: three of the rulings we cite annulled the exclusion. That requires a specialist lawyer; we do not give advice, we check.

From the guide The most frequent causes of exclusion in public tenders, with the ruling that confirms each

Where do these cases come from?

From the rulings published by the Tribunal Administrativo Central de Recursos Contractuales and the tribunals of Madrid, Andalucía and Euskadi, read in their official PDF.

From the guide The most frequent causes of exclusion in public tenders, with the ruling that confirms each

What are the percentage points measured against?

It depends on what it is compared with. Against the budget (one bidder, and the 25 cap with three), against the budget: it is abnormal below 75% of it. Against the average or the other bid, the percentage is taken on the average or on that bid, in amounts: it is abnormal below 90% of the average (or 80% of the other bid), and a bid that exceeds it by more than 10% leaves the calculation. That is how Recomendación 8/2002 of the Comisión Consultiva de Contratación Pública de Andalucía explains it and how committees apply it.

From the guide Abnormally low bids: how they are calculated (art. 149 LCSP and art. 85 RGLCAP)

And if the specifications say something else?

The specifications prevail. Article 85 of the Regulation applies when price is the only criterion and the specifications set no other parameters.

From the guide Abnormally low bids: how they are calculated (art. 149 LCSP and art. 85 RGLCAP)

Do bids from companies in the same group count?

To calculate the average, companies in the same group that bid separately count as one: the lowest is taken (art. 149.3 LCSP and art. 86 RGLCAP).

From the guide Abnormally low bids: how they are calculated (art. 149 LCSP and art. 85 RGLCAP)

Are the ten days working days or calendar days?

Working days: Saturdays, Sundays and public holidays do not count.

From the guide What to deliver within the 10 working days after being proposed as awardee (art. 150.2 LCSP)

Can I remedy something that is missing?

Normally the body grants three working days to remedy defects in what was submitted, but not to provide something you did not have: if the solvency did not exist when the bidding deadline ended, it cannot be fixed.

From the guide What to deliver within the 10 working days after being proposed as awardee (art. 150.2 LCSP)

How much does a surety insurance cost?

It depends on the company and the amount; as a guide, between 0.5% and 1.5% per year of the amount guaranteed.

From the guide What to deliver within the 10 working days after being proposed as awardee (art. 150.2 LCSP)

Grants and subsidies

Do I need a digital certificate to apply for a grant?

If you are a company, yes: legal entities deal with the Administration by electronic means and the application is signed and submitted in the electronic office.

From the guide How to apply for a grant for your SME, step by step

What happens if I make a mistake in a document?

Normally you are asked to remedy it within ten working days. If you do not reply in time, you are considered to have withdrawn the application.

From the guide How to apply for a grant for your SME, step by step

Can I apply for a named grant?

No: a named grant already names its beneficiary in the budgets. There is no call to apply to.

From the guide Competitive tendering and direct award of grants: what they mean for your company

How do I know the regime of an aid?

The rules and the call itself say so. If there is competition, you will see an application deadline and assessment criteria.

From the guide Competitive tendering and direct award of grants: what they mean for your company

Can I submit after the deadline if the electronic office failed?

Only if the Administration itself extends the deadline because of a technical incident in its office. Keep evidence of the failure and submit with room to spare so as not to depend on it.

From the guide 7 mistakes that get your grant application rejected (and how to avoid them)

What is the most frequent mistake?

Submitting late or with incomplete documentation: both are avoided by preparing everything days in advance.

From the guide 7 mistakes that get your grant application rejected (and how to avoid them)

Do I have to provide the tax authority certificate?

It depends on the call: many query it directly if you authorise it in the application; if not, it has to be provided.

From the guide What documentation you need to apply for a grant

What is a declaration of honour?

A signed document in which you declare that you meet a requirement (for example, that you are not under any ban on being a beneficiary). The Administration can check it afterwards.

From the guide What documentation you need to apply for a grant

Can I pay a subsidised expense in cash?

It depends on the rules and on the legal limits on cash payments; the safest is to pay by bank transfer, which leaves a trace.

From the guide How to justify a grant without risking repayment

How long do I keep the proofs?

For as long as the Administration can check the aid: what the rules set and, at the very least, until its right to claim repayment lapses.

From the guide How to justify a grant without risking repayment

Does the BDNS publish the awards?

Yes: besides the calls, it publishes the awards with their amount. That is where what we show in each aid about what has already been awarded and who wins it comes from.

From the guide What the BDNS is and why it is the source of public aid in Spain

Is European aid in the BDNS?

What is managed by the Spanish Administrations, yes. Directly managed aid from the European Commission is published on its Funding & Tenders portal.

From the guide What the BDNS is and why it is the source of public aid in Spain

Does aid for SMEs include the self-employed?

Often yes, because a micro-enterprise can be a natural person with activity. It is decided by the definition of beneficiary in each call.

From the guide Self-employed and SMEs: how to know whether an aid is for you

What is an SME for the purposes of aid?

The European definition: fewer than 250 people and a turnover of up to 50 million euros or a balance sheet of up to 43 million.

From the guide Self-employed and SMEs: how to know whether an aid is for you

Can an SME alone apply for the EIC Accelerator?

Yes: it is an instrument for a company, not for consortia. It is aimed at startups and SMEs with a high-potential innovation.

From the guide European funds for SMEs: what you can apply for without a consortium

How much does the EIC Accelerator give?

Up to 2.5 million euros in grant and, in addition, a possible equity investment of 0.5 to 10 million.

From the guide European funds for SMEs: what you can apply for without a consortium

What you can do · Public tenders

What you can do · Grants and subsidies

What you can do · Invoices and tax deadlines

What you can do · Documents

What you can do · Your account

What you can do · Connector and API

What you can do · The service

Still have questions?

¿No lo encuentras? Escríbenos a privacidad@aim-papyr.ai y te contestamos.

Source of the data: Ministry of Finance (Public Sector Procurement Platform, contracting-authority profiles and aggregated regional platforms). Updated every hour. A tender with codes from several sectors counts in each one.

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