How to Organize Invoices and Papers in 4 Steps

Jul 30, 2025 | Uncategorized

In any company, knowing how to organize papers and invoices is a process that impacts taxation, treasury, and efficiency. With the new regulations for electronic invoices and the Anti-Fraud Law, centralizing and systematizing documents is a fundamental task. This article guides you step-by-step to organize your invoices and files with useful tips and an approach aimed at improving your productivity and legal compliance. Additionally, you will discover why easyap is ideal for putting it into practice.

Why is it so important to organize invoices well?

Many companies —especially SMEs or financial departments with limited resources— delay invoice organization until a problem arises: loss of documents, accounting errors, duplicate payments, or tax penalties.

In contrast, good invoice management offers you:

  • Total control of cash flow and the status of payments and collections.
  • Immediate access to information for audits or legal requirements.
  • Traceability of each invoice (who generates, approves, modifies, and pays it).
  • Comply with regulations ( SII, mandatory electronic invoice, Crea y Crece Law…).
  • Avoid document chaos and additional costs due to human errors or lost papers.

Furthermore, let’s remember that, according to the Tax Agency, invoices must be kept for at least 4 years for tax inspections. Moreover, certain documents related to invoicing may require archiving for up to 10 years.

Automation and Cost Savings

The fact is that digitizing and automating invoice management is a technical improvement and, at the same time, a leverage for profitability for every business and company. Specifically, because:

  • You reduce paper and ink, which lowers direct costs.
  • You optimize time, since employees dedicate fewer hours to repetitive tasks (filing, searching, photocopying, sending..).
  • You avoid penalties, since by automating validations and deadlines, you make fewer errors.
  • Scale with an organized software that allows you to grow without collapsing the financial back office.

In fact, according to a PwC study, companies that digitize their financial processes save between 60% and 80% in operational costs for this management.

What does Spanish law say about invoice organization?

Beyond the operational advantages, knowing how to organize invoices is also legally important. In this regard, the Tax Agency states that:

  • Invoices must be authentic, integral and legible, both on paper and in electronic format.
  • They must be preserved in their original emission format and in an orderly and accessible manner.
  • For electronic invoices their authenticity must be guaranteed by digital signature, EDI or other reliable system and approved.
  • The Anti-Fraud Law requires the use of software that does not allow manipulating accounting and tax data.

With the mandatory electronic invoicing and real-time controls, organizing and digitizing is a necessity for any business that wants to operate with guarantees and without complications in Spain.

How to organize invoices in 4 steps: from paper to digital

Getting to the heart of the matter, we will detail in 4 steps how to organize invoices of all types.

1. Audit and collect your existing invoices

Before implementing a digital solution, it is necessary to have complete visibility of the current situation. For this:

  • Locate and centralize all existing invoices,both paper and digital.
  • Separate by type: issued, received, pending collection or payment, corrective invoices, etc.
  • Identify duplicates or incomplete ones and clean upthose that are not valid.
  • Classify by fiscal year, supplier/customer, and reception channel (mail, email, ERP…).

Tip: create a basic inventory in Excel or an intermediate software to avoid losing traceability during the transition.

2. Digitize paper invoices with reliable tools

Once physical invoices have been collected, it’s time to digitize them correctly.

  • Use high-resolution scanners and OCR tools to convert images into readable and searchable text.
  • Save files in standard formats and accepted by the Tax Agency: PDF/A or digitally signed XML.
  • Organize digitized invoices into folders by year, month, and vendor.
  • Avoid digitizing expired invoices or those without tax value.

Digitization alone is not enough: it must ensure integrity, authenticity, and legibility, especially in case of an inspection.

3. Implement an electronic invoicing system

This is the most crucial step to fully automate the organization of your invoices:

  • Adopt software like easyap, which allows receiving, validating, storing, and approving electronic invoices with automatic workflows.
  • Ensure compliance with the Anti-Fraud Law and the new mandatory invoicing regulations.
  • Automate the processes of verification, digital signature, archiving, and sending to accounting or ERP.
  • Set up due date alerts and approval rules for each type of invoice.

With easyap, you can forget about physical archiving: everything is stored in the cloud with secure access and full traceability.

4. Auditing and continuous improvement

Fourthly, a digital system is not just installed: it must be maintained, audited, and optimized.

  • Schedule quarterly system reviews and check for bottlenecks.
  • Establish automatic backups on secure servers.
  • Train staff on the correct use of the software and update processes when legislation changes.
  • Conduct inspection simulations to verify that the entire process is documented.

An updated digital system avoids penalties, facilitates audits, and enhances the image of control for investors and external auditors.

Comparison: manual vs. digital system

Feature
Manual (paper)
Digital/SaaS (like easyap)

Search time
Minutes or more
Seconds with advanced filters

Risk of human error
High
Low, with automatic validation

Regulatory compliance
Manual, requires supervision
Automatic, in line with the law

Remote accessibility
No
Yes, from any authorized device

Accounting integration
Not integrated
Connected to ERP and accounting systems

Payment tracking
Manual (sheets, email, Excel)
Automated, with reminders and alerts

Useful tips for efficient invoice organization

Besides this step-by-step guide for organizing invoices, we’re going to give you a list of tips you can follow and apply:

  • Establish standard naming conventions for digital files.
  • Use digital colors or labels to identify urgencies or statuses (pending, approved, rejected).
  • Implement a policy of digital document retention: define deadlines by invoice type.
  • Limit access to invoices according to each employee’s role.
  • Monitor overdue, collected, and claimed invoices monthly.
  • Generate automatic reports from the system for a global overview.

Why easyap is useful for organizing invoices and documents

This is where a digital solution like easyap comes into play. But why choose our solution? Because, among other things, you’ll enjoy features and benefits like these:

  • Smart digitalization. Scan your invoices and classify them automatically.
  • Complies with regulations. Generates electronic invoices in compliance with Anti-Fraud Law, SII, legal formats, etc.
  • Workflow automation. Assign documents, create alerts, approve invoices, and track them.
  • Advanced search. Find invoices in the system by date, vendor, amount, or type with a single click.
  • Accounting integration. Directly export all your documents and papers to your ERP and accounting system.
  • Security and backups. Store everything in the cloud, with encryption and access via permissions.
  • Updates and support.You will have continuous support, and the system will be updated according to the latest legal developments.
  • Audit-readyReview and analyze complete historical records and access logs. What’s more, with easyap, you have a certified digital version.

In summary, knowing how to organize invoices is no longer limited to stacking them or using physical folders. With digitalization, automated workflows, and tools like easyap, you transform this task into a strategic process. 

If you are a financial director, the decision to switch from manual to digital with a professional platform will save you costs, increase efficiency, and give you greater peace of mind during any inspection. Contact us to learn about and try software that will boost your productivity.

Increase your company’s productivity and optimize invoicing processes

Still have questions? Contact us

14 + 13 =