The differences between a fake invoice and a falsified invoice are vital in the financial and tax sphere. One term implies the creation of a document that never existed, while the other refers to the alteration of a legitimate invoice. For many financial directors, understanding these nuances is both a legal requirement and a strategic necessity to protect their reputation and ensure the health of the company. So let’s analyze what these two types of fraud are, how to detect them with tools and best practices, what sanctions they entail, and how to eliminate them from your e-invoicing.
By definition, what is the difference between a fake invoice and a falsified invoice?
To understand the difference between a fake invoice and a falsified invoice, one must first deeply understand the meaning of each concept.
- Fake invoice: an accounting document issued by a non-existent supplier or company or one that has not performed any real operation. For example, it occurs when a company is created solely to invoice or document an operation that never existed.
- Falsified invoice: is part of a legitimate document, but its content is modified. In this case, two examples are increasing invoiced amounts to deduct more VAT or changing dates, concepts, or recipients.
Basically, the main difference is that a fake invoice does not exist and is a completely invented document, whereas a falsified one is a real document that has been manipulated with incorrect information to deceive.
The 5 differences between a fake invoice and a falsified invoice
From the definition of each, it is already clear that, a fake invoice and a falsified invoice are not the same. Erroneously, they are sometimes used as synonyms, but they have distinct and severe legal and tax consequences, especially if you are a financial manager in a company.
Specifically, these are their five differences main:
Practical Examples:
- Fake Invoice: a “ghost” company invoices another for a consulting service never provided to deduct VAT or justify expenses.
- Tampered Invoice: a real transport invoice is modified by increasing the amount from 2,000€ to 3,000€ to deduct more VAT than is due.
Cases where fake or tampered invoices are used
- Pay less VAT: increase expenses to deduct nonexistent VAT and, consequently, defraud the supplier.
- Reduce income/taxes: issue invoices with amounts lower than the actual figures by adjusting costs and income.
- Unemployment capitalization by manipulating documentation: simulate registration/service with fake invoices.
- Insurance or claims: tampered invoices to justify a higher value of the asset.
- Internal embezzlement: a person generates inflated expenses with tampered invoices.
How does the Tax Authority detect fake or tampered invoices?
Both fraudulent and tampered invoices are illegal. But how does the Tax Authority detect them? The control exercised by the Spanish tax body is increasingly intelligent and effective.
In fact, nowadays, with digitalization and automated systems, the Tax Authority can:
- Cross-reference data and suppliers.This way, it compares supplier and customer VATs or detects the absence of suppliers in other tax records.
- Review Form 347 and 349. In this way, it verifies important operations (for example, foreign trade or intra-community trade scenarios).
- Analyzes Intrastat and IOSS. In other words, it performs an internal control of trade operations.
- Applies OCR technology and document analysis. With this method, it also recognizes patterns of falsification: atypical margins, series manipulation…
- Works with Big Data and company correlation. In this way, it detects invoices that fit fraudulent patterns: groups of linked companies, unusual volumes…
- On-site checks. Requests documentation: contracts, delivery notes, accounting vouchers.
Furthermore, the Tax Agency’s data analysis engine automatically “alerts” about invoices that do not meet consistency standards.
Keys to detecting a fake or falsified invoice
More specifically, to identify fake and falsified invoices, you can also look at the following aspects in each case, as the Tax Agency does.
Fake invoices
- Unknown supplier or without an online presence.
- Activity that does not fit with your sector or purchasing volume.
- Incomplete data: erroneous Tax ID, dubious address, omission of mandatory billing data…
- Atypical amounts in relation to your usual purchases.
- Inconsistencies in bank records: invoice issued but no transfer.
Falsified invoices
- Modified amounts compared to accepted budgets or prior agreements.
- Altered concepts to justify VAT deductions or unreal expenses.
- Date discrepancy.
- Duplication or incorrect use of the same invoice in different accounting sections.
- Visible PDF edits: for example, modified Adobe properties.
Quick checklist for your finance team
Additionally, we provide a quick checklist for you and your team to identify fake or falsified invoices before they reach the Tax Agency.
- Verify that the supplier’s CIF (Tax ID) is listed in the Tax Agency’s registry.
- Cross-reference supplier and bank: does the transaction align?
- Compare against a history of usual expenses.
- Review dates: issuance vs. service vs. collection…
- Use accounting software with legal formats and that detects alterations (PDF+XML versioning).
Applicable penalties for falsified and fake invoices
Should the Tax Agency identify any of these documents, there is a risk of incurring penalties such as those we now cite.
- Minor tax infraction: 50% penalty on the amount due, if rectified.
- Serious tax offense: here, at most, is where falsified invoices are categorized. They incur a 100% penalty on the amount due, and 150% if there is repeated false documentation.
- Tax crime: a fake invoice usually entails a fine proportional to the defrauded amount (up to 150%) and prison sentences of 1 to 6 years in severe cases (Art. 305 of the Penal Code).
Additionally, there are more indirect risks such as:
- Loss of deduction right for VAT.
- Reputational repercussions with media and clients.
- Preventive control and blocking by the Tax Agency, which will halt subsequent declarations.
How does easyap help you avoid fake and falsified invoices?
This is where easyap comes in. A solution that protects your finances with the following guarantees:
- Secure supplier registration: CIF verified with electronic headquarters and digital certificates.
- Preventive control: alerts if the supplier is liquidated or out of registry.
- Digital seals and optional blockchain verification.
- Automated versioningthat prevent editing PDFs without an audit trail.
- Invoice Reconciliation with bank statements and supplier tax data.
- Detection of VAT deviations, out-of-range amounts, and suspicious dates.
- Dashboard for:
- Invoices with unusually high VAT.
- Spending categories outside historical trends.
- Alerts when an invoice does not match the monthly/quarterly pattern.
- Automated regulatory updates (VAT, Personal Income Tax, tax rates).
- Tax forms 303, 347 and compliant reports with inspections.
- Full traceability:which user uploaded it and who validated it.
- Access log:full compliance with information security policies.
If, as a financial director, you want to protect yourself, be proactive. Understanding the differences between a fake and a falsified invoice, knowing how the Tax Agency acts, what penalties exist, and how they are evidenced in your accounting is the first step.
But,the decisive factor is to prevent with effective internal processes, training, and a system like easyap. With easyap, you achieve legal compliance and shield your processes against fraud in a scalable, digital, and easy way. Contact us and discover software that acts as a daily audit and serves as a shield against penalties.

