Owing to the entry into force of the aforementioned modification to the “Information Society Services Law” (LSSICE) established by Royal Decree 13/2012, it is compulsory for the explicit consent of any user using websites that employ nonessential cookies to be obtained before he/she begins browsing.


Cookies and other similar technologies, such as local shared objects, flash cookies or pixels, are tools used by Web servers to store and recover information about website visitors, and also to ensure correct functioning of the website.
The use of these devices allows the Web server to remember some user data, such as his/her preferences for viewing the pages on that server, name and password, products of most interest to him/her, etc.


According to the EU Directive, the cookies that require the user’s informed consent are analytics cookies and cookies used for advertising and membership; excluded from this category are those of a technical nature and those necessary for the website to function correctly and the services explicitly requested by the user to be provided.


There are five major groups of cookies:

  • Analytics cookies: they collect information on the use made of the website.
    Social cookies: these are necessary for external social networks.
  • Affiliate cookies: these allow tracking of visits from other websites, with which the website has signed an affiliate agreement (affiliated companies).
  • Advertising and behavioural cookies: these collect information on the user’s personal preferences and choices (retargeting).
  • Technical and functional cookies: these are the cookies strictly necessary for the use of the website and the provision of the contracted service.


  • PHPSESSID: a strictly necessary technical cookie that contains the session identifier. It is erased when the browser is closed.
  • _lang: a strictly necessary technical cookie that contains the session language. It is erased when the browser is closed.
  • ac_cookies: technical and strictly necessary cookie that contains the value of whether the installation of cookies has been accepted. It expires 1 year after the last use.
  • _ga: Google Analytics cookie that enables the monitoring function for single visits. The first time a user enters the website via a browser, this cookie will be installed. When this user re-enters the website with the same browser, the cookie will consider that it is the same user. Only if the user changes browser will he/she be considered a different user. It expires 2 year after the last use.
  • _gat: this cookie is associated with Google Analytics Universal. It is used to limit the request speed – a limitation on the collection of data on websites with high traffic. It expires after 10 minutes.
  • _utma: Google Analytics cookie that records the date of first and last time the user visited the site. It expires 2 year after the last use.
  • _utmb: Google Analytics cookie that records the time of arrival at the website. It expires 30 year after the last use.
  • _utmc: Google Analytics cookie used for interoperability with the tracking code urchin.js. It is erased when thebbrowser is closed.
  • _utmt: Google Analytics cookie. This cookie is used to process the type of request made by the user. It expires when the session ends.
  • _utmv: Google Analytics cookie. This cookie is used to segment demographic data. It expires when the session ends.
  • _utmz: Google Analytics cookie that stores the traffic source or a campaign to explain how the user reached the website It expires 6 months after the last use.


1. Select the Tools icon
2. Click on Settings.
3. Click on Advanced.
4. In the section “Privacy and security”, click on Content Settings.
Remove cookies: Click on All cookies and site data…
Do not allow cookies to be stored.
5. Click on Delete browsing data (empty Cache).
6. Close and re-open the browser.
For more information on Chrome, click here:

Internet Explorer. Version 11
1. Select Tools / Internet Options.
2. Click on the “General” file.
3. In the section “Browsing history”, click on Delete browsing history upon leaving.
4. Select Remove files.
5. Select Remove cookies.
6. Click on Remove.
7. Click on OK.
8. Close and re-open the browser.
For more information on Internet Explorer, click here:

Firefox. Version 18
1. Select Firefox | History | Clear recent history.
2. Alongside “Details”, click on the down arrow.
3. Select the following checkboxes: Cookies, Cache, Active Logins
4. Using “Time range to clear” in the pull-down menu, select Everything.
5. Click on Clear Now.
6. Close and re-open the browser.
You can accept or reject the cookies individually in Firefox Preferences, in the History section available in Tools > Options >
Privacy and Security.
For more information on Mozilla Firefox, click here:

Safari Version 5.1
1. Select the Safari icon / Edit | Restore Safari.
2. Select the following checkboxes: Clear history, Remove all website details
3. Click on Restore.
4. Close and re-open the browser.
For more information on Safari, click here:

Options – Advanced – Cookies.
The cookies options control the way in which Opera deals with them and, thus, whether they are accepted or rejected. For
more information on Opera, click here:

Other browsers
Consult the documentation for the browser you have installed.