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Terms of Service

Last updated: November 3, 2026

Who provides this service

Descodify is provided by DESCODIFY, UNIPESSOAL LDA (NIPC 519352548), registered at the Conservatória do Registo Comercial de Aveiro under matrícula 519352548.

These terms govern your use of Descodify, an invoicing and tax reporting tool for solo entrepreneurs in Portugal. By creating a user account, you agree to these terms.

We keep these terms in plain language. If anything is unclear, email us at hello@descodify.pt.

What Descodify is

Descodify is software for solo entrepreneurs in Portugal. It is a tool that assists you with your tax and invoicing obligations - it does not replace professional accounting or legal advice.

Your user account

  • You must provide accurate information when creating your user account
  • You are responsible for keeping your login credentials secure
  • One person per user account - do not share your login with others. If you work with a certified accountant or a bookkeeper, invite them to your business through Descodify instead

Your data and content

You own your data. Invoices, customer records, expenses, documents, and any other content you create in Descodify belong to you. We do not claim ownership of your content.

You grant us a limited license to store, process, and display your data as needed to provide the service - for example, to generate invoices, calculate VAT, or sync with the Portuguese tax authority portal when you request it.

You can export your data at any time. If you delete your user account, your data and your business's records are kept as our Privacy Policy describes.

When we process data for your business

When you use Descodify for your business, we process personal data on its behalf. Your business decides what that data is for, and we act as its processor under the GDPR (Art. 28). This section is our agreement with your business about that data.

  • What and for how long. Your business's data, for as long as your business uses Descodify.
  • Why. Only to run the features your business uses.
  • Whose data. Your business's own, and that of its customers and others who appear in its records.
  • Your instructions. We act only on your business's documented instructions. Using the service is that instruction.
  • Confidentiality. Everyone who works on Descodify is bound to keep the data confidential.
  • Security. We protect the data as our Security page describes.
  • Sub-processors. Your business authorises the sub-processors listed on our GDPR page. We tell owners before we add one, so they can object.
  • Requests and breaches. We help your business answer people who ask about their data, and we help it deal with a data breach.
  • When you leave. Your business can export its data. The rest is kept as our Privacy Policy describes.
  • Showing compliance. We give your business what it needs to show that these terms are kept.

Invoicing

A few things to understand about how invoicing works here:

  • Invoices are permanent. Once an invoice is issued, it cannot be edited or deleted. This is a legal requirement, not a limitation of the software. To correct an invoice, you issue a credit note.
  • Sequential numbering. Invoice numbers are assigned automatically and cannot be changed. Gaps in numbering may need to be explained to the tax authority.
  • You are responsible for accuracy. Descodify automates VAT calculations and applies rules based on your business profile and customer details, but you are responsible for reviewing invoices before issuing them. The tax authority holds the NIF owner accountable, not the software provider.

Tax authority integration

If you connect your Portal das Finanças account, Descodify uses a separate login on the AT portal made only for Descodify (a subuser).

  • You can revoke the subuser at any time in the AT portal
  • We never store your main login
  • Disconnecting your portal in Settings deletes the stored credentials at once

AI assistant

Descodify includes an optional AI assistant that can answer questions about Portuguese tax, invoicing, and Social Security. It is off until an owner or partner of your business switches it on in the business settings. Important limitations:

  • Not professional advice. The AI assistant provides general information based on Portuguese tax rules. It is not a substitute for advice from a qualified accountant or tax professional. Always verify important decisions with a professional.
  • May be inaccurate. AI responses can contain errors. Do not rely on the assistant as your sole source of information for tax filings or compliance decisions.
  • Optional. Descodify works fully without the AI assistant, and an owner or partner can switch it off again at any time in the business settings.

Use the assistant for questions about tax, invoicing and running your business. When you use it:

  • Keep sensitive personal data out. Do not enter special categories of personal data about yourself or anyone else, such as information about health or disability, racial or ethnic origin, political opinions, religious or philosophical beliefs, trade-union membership, genetic or biometric data, or sex life or sexual orientation. The assistant is set up to decline questions that need this kind of information; for those, ask a certified accountant (contabilista certificado).
  • What you enter is your choice. You decide what you type into the assistant, including any details about other people such as your customers, and you are responsible for entering only what you are entitled to share. A message you send is stored with the conversation and sent to our AI provider, even if the assistant then declines to answer it.

Acceptable use

You agree not to:

  • Use Descodify for fraudulent invoicing or tax evasion
  • Attempt to circumvent invoice sequencing, certification controls, or other compliance mechanisms
  • Access other users' data or businesses without authorization
  • Use automated scripts to access the service in a way that degrades it for other users
  • Reverse-engineer, decompile, or attempt to extract the source code of the tool

We may suspend or terminate a user account, or a business's use of Descodify, if it violates these terms.

Fair use and service limits

To keep Descodify fast, reliable, and secure for everyone, we may set reasonable limits on how the service is used. This section applies both to your general use of Descodify and to any use of our external API or developer tools.

We may set, apply, and change usage, rate, volume, and quota limits at our reasonable discretion — for example, limits on how many API requests you can make in a given period, or a daily cap on the number of invoices you can issue. These limits may differ by plan or tier, and the free tier is subject to fair-use expectations. The limits in force at any time are the ones we publish or otherwise communicate to you (for example, on our pricing page or in our API documentation), and they may change over time. If you need a higher limit, you can ask us and we will consider your request.

We may throttle, rate-limit, restrict, suspend, or — as a last resort — terminate your access to the service, in whole or in part, where this is necessary and proportionate to address:

  • abuse of the service, or use that is fraudulent or unlawful
  • excessive or disproportionate use, or automated or bulk use that goes beyond fair use or beyond the limits we publish or communicate
  • use that threatens the stability, security, or integrity of the service or of other users
  • attempts to circumvent usage limits, rate limits, or other technical controls
  • breach of these terms or of applicable law

We will act proportionately and choose the least disruptive measure that addresses the problem, and we will restore normal access once the issue is resolved. Except where the situation is urgent — for example, a security threat, ongoing abuse, or a legal requirement, where we may act immediately — we will give you reasonable notice before restricting or suspending your access, and an opportunity to put things right where appropriate. Applying a limit under this section does not affect any amount you have already paid for service already provided, and if we terminate your user account, or your business's use of Descodify, for reasons other than your breach of these terms, we will refund any prepaid amount covering the period after termination.

Service availability

We aim to keep Descodify available and reliable, but we do not guarantee uninterrupted access. The service may be temporarily unavailable for maintenance, updates, or reasons beyond our control.

We will make reasonable efforts to notify you in advance of planned downtime. We are not liable for losses arising from service interruptions.

Pricing and payment

Descodify offers a free Starter plan and paid plans (Completo at €19/month, IRS Filing at €49 one-off). See our pricing page for current details. You will never be charged without explicitly opting in to a paid plan.

Limitation of liability

Descodify is provided “as is” without warranty of any kind, whether express or implied.

  • We are not liable for errors in tax calculations, VAT determinations, or any other automated outputs. You are responsible for reviewing and verifying all invoices and declarations before submission.
  • We are not liable for any penalties, fines, or tax adjustments imposed by the Portuguese tax authority or any other government body as a result of using Descodify.
  • Our total liability to you for any claim arising from your use of Descodify is limited to the amount you paid us in the 12 months preceding the claim, or €100, whichever is greater.

Intellectual property

Descodify, its design, code, and branding are owned by us. These terms do not grant you any rights to our intellectual property beyond the right to use the service as intended.

Your data remains yours. We do not use your invoices, customer data, or financial records for any purpose other than providing the service.

Termination

You can delete your user account from Settings. When you do:

  • You download an archive of your data before you can delete your user account, and for 30 days after the request you can download it again or reactivate your user account (see how to delete your user account)
  • Any business you are the only member of closes with your user account
  • Your data and your business's records are kept as our Privacy Policy describes

An owner can also close a business in Descodify, for everyone in it, from Settings, and any owner can reopen it. When a business closes, on its own or with your user account, its paid plan stops that day and the days left are not refunded.

We may terminate your user account, or your business's use of Descodify, if you violate these terms, with notice where possible.

Changes to these terms

We may update these terms from time to time. When we make significant changes, we will notify you by email or through a notice in the app at least 30 days before the changes take effect. Continued use of Descodify after the changes take effect constitutes acceptance of the updated terms.

Governing law

These terms are governed by the laws of Portugal. Any disputes will be resolved in the courts of Portugal, without prejudice to any mandatory consumer protection rights under EU law that may apply in your country of residence.

Consumer rights (non-professional users)

If you are using Descodify outside your trade or profession (for example, exploring free tools before registering an activity), you are a “consumidor” under Portuguese consumer-protection law (Lei 24/96). In that case, the following channels are available to you in addition to your rights under these terms:

  • Complaints — email privacy@descodify.pt. You can also submit a complaint through the Portuguese electronic complaint book at www.livroreclamacoes.pt.
  • Alternative dispute resolution (ADR) — under DL 144/2015 and the EU ADR Directive 2013/11/EU, you can refer a consumer dispute to CNIACC (Centro Nacional de Informação e Arbitragem de Conflitos de Consumo) at www.cniacc.pt.

Users acting in the course of a trade or profession (registered sole traders and companies) are not consumers under Lei 24/96 and the consumer-protection channels above do not apply, but you can still raise any issue with us by email at hello@descodify.pt.

Contact

For questions about these terms, email us at hello@descodify.pt.