What AIMA Actually Said (and When)
On 11 May 2026 AIMA published a brief but consequential notice on its own news page titled Documentos digitais e assinaturas eletrónicas. The agency confirmed that documents signed digitally with three Portuguese state-issued signature systems — the Cartão de Cidadão (Citizen Card), the Chave Móvel Digital (Digital Mobile Key) and the Sistema de Certificação de Atributos Profissionais (SCAP) — are valid for residency applications and renewals "when admissible under Portuguese law." The agency went further than confirmation: it actively recommended that applicants opt for digital submission of documentation whenever possible. The Portuguese press picked up the story two days later, with Público covering it on 11 May and The Portugal News reporting it in English on 13 May 2026.
The timing matters. AIMA opened its renewal portal for residence permits expiring in July and August 2026 on 7 May, four days before the digital-signature confirmation. Anyone whose card expires in those two months is now in the active assembly phase of their renewal file — gathering declarations, certificates and proofs — and is the immediate beneficiary of the policy clarification. For applicants who had assumed they would need to scan ink-signed paper into PDFs and upload them, the change collapses several hours of work and removes one of the most common rejection vectors in AIMA's document-validation queue. As The Portugal News reported: AIMA "accepts digitally signed documents with the Citizen Card, Digital Mobile Key, and Professional Attributes Certification System (SCAP), when applicable."
The legal basis for AIMA's position is not new — Regulamento (UE) n.º 910/2014 (eIDAS) and Decreto-Lei n.º 12/2021 already recognise qualified electronic signatures as legally equivalent to handwritten signatures across the EU and within the Portuguese legal order. What is new is AIMA's explicit operational acceptance of the three Portuguese implementations of qualified electronic signatures. Before May 2026, applicants and their lawyers commonly received rejection notes asking for "physical original" or "ink-signed" documents even when the digital signature was qualified under eIDAS. That ambiguity is now closed.
The Three Signature Methods
The Cartão de Cidadão is the Portuguese national identity card and, for Portuguese citizens, the default qualified-signature device. The card contains an embedded electronic certificate; signing a document with the Cartão de Cidadão requires a contact card reader, the Autenticação.gov client software, and the citizen's six-digit signature PIN (different from the authentication PIN). For Portuguese-citizen spouses, parents or sponsors filing supporting declarations in an expat's AIMA case, the Cartão de Cidadão is the simplest signature path. The card itself must be active and not in the post-issuance "first-PIN-change" lock; that is the most common reason a Cartão de Cidadão signature fails at AIMA's portal-side validation.
The Chave Móvel Digital is the more flexible option for foreigners. It is a state-issued mobile signature that lives on the citizen's phone (or laptop, via the portal). Activation links the Chave Móvel Digital to a holder identifier — for a Portuguese citizen that is the Cartão de Cidadão number, but for a foreign national it is the NIF (Número de Identificação Fiscal) plus passport. Once activated, the signer enters a four-digit PIN and an SMS confirmation code at the moment of signing, and a qualified PDF signature is appended to the document. No card reader, no USB token, no installed software beyond a browser. For expats who have a Portuguese NIF but no Cartão de Cidadão, the Chave Móvel Digital is the recommended path.
SCAP — the Sistema de Certificação de Atributos Profissionais — is the niche third method. It overlays a professional attribute on top of a qualified signature: a lawyer signs as advogado em exercício, an accountant signs as contabilista certificado, a solicitor signs as solicitador. For the typical expat filing their own AIMA case, SCAP is not relevant. It becomes relevant when a Portuguese lawyer is filing on the expat's behalf and AIMA requires evidence that the signatory holds the claimed professional capacity. Most procurações (powers of attorney) signed by Portuguese counsel in 2026 now carry a SCAP-flagged signature alongside the lawyer's personal qualified signature.
Activating Chave Móvel Digital as a Foreigner
Foreign nationals can activate the Chave Móvel Digital through several routes. The in-person route at any Cartão de Cidadão balcão is the most reliable — the applicant brings their passport plus their NIF documentation, the operator verifies identity, and the Chave Móvel Digital is provisioned to the applicant's mobile number on the spot. The same service is offered at most Espaços Cidadão and at certain CTT (post office) counters. Activation is free. The full list of activation points is published at autenticacao.gov.pt/cmd-pedido-chave.
There is also an online activation path for holders of an EU national identity card with electronic-signature capability, or for foreigners whose home-country eID is recognised under the eIDAS Regulation. In practice the online route works smoothly for German, Estonian, Spanish, Belgian and Italian eIDs; less consistently for other nationalities. For Americans, British, Canadians and Australians without an EU eID, the in-person route is the only viable option. Plan a Cartão de Cidadão balcão visit alongside the next AIMA appointment or NIF update — the Chave Móvel Digital then becomes a permanent infrastructure available for all future filings, not just AIMA.
Once active, the Chave Móvel Digital is tied to a single mobile phone number. Changing phones or losing the SIM means redirecting the Chave Móvel Digital to a new number, which itself requires the original PIN and either an SMS to the old number or another in-person visit. Many expats only discover the mobile-number dependency at the moment they need to sign a renewal document from abroad on a temporary travel SIM. The simplest defence is to register the Chave Móvel Digital against a Portuguese phone number on a long-term plan, not a roaming SIM or a tourist eSIM, and to keep the recovery PIN stored somewhere accessible from outside Portugal.
Signing Documents in Practice
For the Cartão de Cidadão route, the signing tool is the Autenticação.gov client (downloadable for Windows, macOS and Linux). The signer inserts the card in a USB card reader, opens the PDF in the client, places the signature graphic where required, and enters the six-digit signature PIN. The output is a PDF/A document with an embedded qualified signature visible in any reader. AIMA's portal validates the signature at upload time; failures at this stage almost always trace back either to a non-PDF/A format or to a card-PIN entry mistake (three wrong PINs locks the card and forces an in-person reset).
For the Chave Móvel Digital route, the signing tool can either be the Autenticação.gov client (same software as the Cartão de Cidadão flow) or one of the web-based signing portals at autenticacao.gov.pt/cmd-assinatura. The web flow is simpler: upload the PDF, place the signature box, click Assinar, enter the Chave Móvel Digital PIN, enter the SMS confirmation code, download the signed PDF. The whole flow takes under a minute per document once the Chave Móvel Digital is set up.
For applicants filing multi-document AIMA bundles (renewal applications can run to ten or twelve PDFs), the recommended workflow is to assemble all PDFs first, then sign them in a single sitting. The Chave Móvel Digital SMS confirmation is rate-limited to roughly one signature per minute, so a batch of twelve PDFs takes about fifteen minutes of focused work. Signed PDFs should then be reviewed in a reader that displays the signature panel — every signed PDF should show a green check and the signer's name and NIF in the signature inspector. If any document shows a yellow triangle or red X, re-sign before uploading; AIMA's portal rejects signatures that do not validate cleanly.
Which Documents Are Now Accepted Digitally
The practical question for an expat assembling a residency file is: which documents in my bundle can I now sign digitally, and which still need ink signatures or apostilles? The clearest rule is that any document the applicant or their Portuguese-citizen sponsor signs personally can now be signed digitally with Cartão de Cidadão or Chave Móvel Digital. That covers declarations of address (declaração de morada), declarations of income source, consent forms for data processing, the AIMA application form itself when the portal generates a signable PDF, the procuração granting a lawyer power to file on the applicant's behalf, and the family-relationship declaration in Article 15 and family-reunification cases.
Documents that originate outside Portugal — foreign marriage certificates, foreign police clearance certificates, foreign tax records, foreign birth certificates — still need to be apostilled in the country of origin and scanned. The digital-signature change does not touch the apostille requirement, which exists under the 1961 Hague Convention and is a sovereign-recognition question, not a signature question. Mixing apostilled-and-scanned foreign documents with digitally-signed Portuguese-origin documents in the same AIMA submission is the normal pattern and works correctly.
Bank statements, employment contracts and rental contracts sit in a middle category. Where these documents have been digitally issued by the bank, employer or landlord with their own qualified electronic signature, AIMA now accepts them directly. Most Portuguese banks (CGD, Millennium, Novobanco, ActivoBank) issue qualified-signed PDF statements on request. Most landlords and Portuguese employers do not yet routinely issue qualified-signed contracts; in those cases an ink-signed and scanned contract remains the practical document, optionally with the applicant's own digital signature appended as a co-signer.
Interaction With the July/August Renewal Window
The May 2026 digital-signature confirmation paired with the renewal portal opening on 7 May for July and August expiries creates a specific operational window. Permit holders with cards expiring in July 2026 should have their renewal file submitted by mid-June; holders with August expiries should have theirs submitted by mid-July. The digital-signature path is the fastest assembly route in that window because it removes the print-sign-scan-upload cycle that historically consumed the last 24 hours of every renewal sprint.
Golden Visa renewals carry a specific operational caveat AIMA reiterated in May 2026: the holder's NIF must be associated with the AIMA portal registration before the renewal is submitted. If the NIF was never linked at the initial application — common for files submitted before 2024 when the manifestation-of-interest pathway was active — the digital signature will validate but the file itself will fail at portal-level matching. The fix is to update the AIMA portal profile with the NIF before initiating the renewal. Our piece on renewal documents by visa type covers the document checklist; the NIF-link step now precedes that checklist for any Golden Visa renewal.
For applicants whose AIMA appointment is months away but who are filing the renewal application now, the digital-signature confirmation also closes off one of the most common rejection vectors at the document-validation stage. Before May 2026, AIMA's portal sometimes returned a request for "physical original" of a declaration the applicant had signed electronically — a process round-trip that could add weeks to the file. Those round-trips should now stop, as long as the signature is one of the three accepted types and validates cleanly in the PDF reader. If a rejection note arrives anyway, the applicant should reply citing the 11 May 2026 AIMA notice (link) and request that the file proceed.
Frequently Asked Questions
Which digital signatures does AIMA accept?
Three: Cartão de Cidadão, Chave Móvel Digital, and SCAP. All three are Portuguese state-issued qualified electronic signatures. DocuSign, Adobe Sign and other commercial signature platforms without a qualified certificate under eIDAS are not on the accepted list.
Can I activate the Chave Móvel Digital without a Cartão de Cidadão?
Yes. A foreign national with a Portuguese NIF and a passport can activate the Chave Móvel Digital in person at any Cartão de Cidadão balcão, most Espaços Cidadão, or at certain CTT post offices. Activation is free and takes 10–15 minutes. EU eID holders can also activate online at autenticacao.gov.pt.
Do I still need apostilles on foreign documents?
Yes. The digital-signature change applies to documents the applicant or a Portuguese signer creates inside the application. Foreign-origin documents — marriage certificates, police clearances, birth certificates — still need an apostille from the country of origin under the 1961 Hague Convention.
Does this apply to Golden Visa renewals?
Yes. The single additional step for Golden Visa renewals is that the holder's NIF must be associated with the AIMA portal registration before the renewal is submitted. The digital signature will not save a file where the NIF link is missing.
What happens if AIMA still asks for "physical original" after I uploaded a digitally signed PDF?
Reply citing the 11 May 2026 AIMA notice "Documentos digitais e assinaturas eletrónicas" and confirm that your signature is a qualified electronic signature under Regulamento (UE) n.º 910/2014. Attach a screenshot of the PDF signature panel showing the green-check validation. In our experience the file then proceeds; if it does not, escalate via the AIMA contact form citing the same notice.