From 1 September 2026, Spain Social Security electronic notifications became compulsory for more people. The change is about delivery. It does not create a new sick leave procedure or a new category of benefit.
If you apply for or receive temporary incapacity benefit, or have a case involving permanent incapacity or a permanent non-disabling injury, decisions and requests from the National Social Security Institute (INSS) may now be delivered to the SEDESS electronic inbox instead of by post.
The change comes from Order ISM/541/2026, published in the Official State Gazette on 1 June 2026 and in force since 1 September. It amended Order ISM/903/2020, the rules governing Social Security notifications.
What changed, and which notices are now electronic?
Before 1 September, people were not placed under the mandatory electronic-notification rule simply because they had one of these incapacity benefits or procedures. An INSS decision could still reach them by post, even if an electronic copy was also available.
Since 1 September, the people added by the order must receive the relevant INSS notifications and communications electronically. The official document is placed in SEDESS. An email or SMS is only an alert telling you to look there. It is not the notification itself.
The new rule covers three areas:
- INSS notifications and communications concerning temporary incapacity benefit, incapacidad temporal, for people who apply for or receive it. This is the benefit associated with many periods of certified sick leave, or baja médica.
- Notifications and communications that concern permanent incapacity benefit, incapacidad permanente.
- Notifications and communications that concern a permanent non-disabling injury, lesión permanente no incapacitante. This benefit is normally a one-off payment for a lasting work-related injury that does not amount to permanent incapacity.
The order does not provide a closed list of document names. It uses the wider phrase “notifications and communications relating to” these benefits. Depending on the case, the electronic inbox may therefore contain:
- an INSS resolution granting, refusing, changing or reviewing an incapacity benefit;
- a request for documents, evidence or another action needed to process the case;
- a communication connected with an INSS medical assessment or review;
- a decision about continuing temporary incapacity, ending it with an INSS medical discharge, or moving the case towards a permanent incapacity decision;
- the decision on the degree of permanent incapacity, a later review of that degree, or a decision on compensation for a permanent non-disabling injury.
These are examples, not a new set of notices introduced on 1 September. OCU gives an INSS medical discharge issued after a longer period of sick leave as one practical example of a decision that may now appear electronically instead of arriving as a letter.
The reform does not change how an ordinary sick leave starts. Your doctor still issues the medical certificate, and the existing electronic exchange with Social Security and your employer continues. You do not have to log into SEDESS to ask for the initial sick note or carry it to your employer because of this reform. The order also does not turn every message from a doctor, regional health service, employer or mutual insurance provider into a SEDESS notification. It governs notifications and communications from the Social Security Administration.
Nor does it end every Social Security letter on paper. Receiving a retirement pension or another benefit outside the listed categories does not, by itself, place someone in this newly added group. Other electronic-notification duties may still apply for separate reasons.
Paper and other non-electronic methods remain possible in defined situations. For the newly covered groups, the administration may use a non-electronic method if it has no electronic contact details for sending the alert. Exceptions also cover documents that cannot be converted to an electronic format, payments such as cheques, urgent cases and situations requiring direct delivery by a public employee.
At a Social Security Information and Assistance Centre, usually called a CAISS, an official may help an affected person access SEDESS. If you need this support, contact the office first to check its current arrangements. A possible paper exception is not a safe fallback once an online deadline is running.
How the SEDESS inbox and 10-day rule work
The official inbox is in the Social Security electronic office, SEDESS. You can reach the notification consultation and signature service through the official Social Security website.
When accessing the service in your own name, you can use advanced Cl@ve Móvil, Cl@ve Permanente or an accepted electronic certificate. If a notification contains special-category personal data, the service requires Cl@ve Permanente or a certificate. Health-related cases can involve sensitive data, so I would test one of those stronger methods before an urgent notice is waiting.
The ten-calendar-day access window is easy to misunderstand. Under the consolidated notification rules, a notification takes effect when an authorised recipient accesses its contents in SEDESS. If nobody accesses it within ten calendar days after it is made available, it is treated as rejected.
Rejected does not mean cancelled. It means the administrative procedure can continue even though you did not open the document. A deadline for responding, submitting evidence or appealing may then be affected. The exact period is not automatically ten days. It depends on the decision and procedure, so read the dates and instructions in the document itself. If the notice contains an adverse decision or you are already close to a deadline, seek advice promptly from a qualified professional.
Social Security should send an informational alert to the device and/or email address previously supplied for that purpose. The alert is helpful, but it has no independent legal effect. The notification can remain valid if the alert is omitted, goes to an old address, lands in spam or is otherwise missed.
The rules contain one protection for a serious SEDESS outage. If access is impossible for more than 12 hours for reasons attributable to the Social Security Administration, the ten-day period is temporarily suspended. A lost password, expired certificate or personal internet problem does not count as an administration outage.
A practical checklist for expats in Spain
Start by reviewing the details that Social Security holds for you. The Importass personal data service lets you check and update your mobile number, email address and address with the General Treasury of Social Security. If you have an active benefit application, I would also confirm that the contact details attached to the case are correct.
Test your digital identity before you need a time-sensitive document. Check that Cl@ve works on your current phone, or that your electronic certificate is installed and valid. If you still need a certificate, this guide explains how to obtain an FNMT digital certificate in Spain.
Bookmark the official notification service and check it directly while you have an active temporary or permanent incapacity matter. Download the document and its receipt. Note the date it was made available and the date it was opened, because those dates may matter later.
If a gestor, lawyer or other representative handles the case, confirm in writing who monitors the electronic inbox and whether that person has a registered power covering notifications. An employment adviser or RED-authorised gestor does not automatically receive every personal benefit notice.
Treat email, SMS and postal mail as supporting channels. None replaces access to the official inbox once electronic delivery applies to you. This is especially important if you travel, spend time outside Spain or use a phone number that you do not check every day.
What to do now
If you are on sick leave, have applied for temporary incapacity benefit or have an open permanent incapacity case, log into SEDESS and confirm that you can reach the notification area. Update your contact details in Importass and keep a working Cl@ve Permanente or electronic certificate ready.
The rule does not abolish every paper Social Security letter. It does make paper unsafe to rely on for the affected incapacity matters. Check the official inbox while a claim or review is active, and act on the deadline stated in each document.
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