Porén, as ligazóns mortas non poden previrse sempre, polo que tamén se explica nesta páxina como mitigar este problema atopando ligazóns arquivadas previamente e outras fontes alternativas. '''Non se debe eliminar''' información referenciada soamente porque a URL da fonte non estea xa dispoñible. ''A [[Wikipedia:Verificabilidade|verificabilidade]] non require que tódala información referenciada inclúa unha ligazón dispoñible, nin require que a fonte estea publicada en liña.'' Agás as URLs das seccións de [[Wikipedia:Ligazóns externas|ligazóns externas]] non usadas para referenciar contido nos artigos, '''non se debe eliminar''' unha URL soamente polo feito de que non estea xa dispoñible.
A second way to prevent link rot is to use a [[web archiving]] service. The two most popular services are the [[Wikipedia:Using the Wayback Machine|Wayback Machine]], which crawls and archives many web pages as well as having a form to suggest a URL to be archived,<ref name="ia_form" group="note">Using the web form at https://archive.org, enter a URL and click "browse history". This will either redirect to show the latest previously archived copy, present a box near the bottom of the page with a link inviting the user to "save this URL in the Wayback Machine", display a calendar showing the extent of previously archived content for that URL, or show an error message explaining why the URL cannot be archived. If archiving is attempted and ultimately successful, the archived copy usually becomes available within minutes.<br/>
Alternately, you can use the bookmarklets listed at [[Wikipedia:Citing sources/Further considerations#Archiving bookmarklets]]. The bookmarklets enable you to cause the page that you are viewing to be archived with a single click. A new tab will open with the progress of the archiving without disturbing the tab you are using to view the to-be-archived page. Bookmarklets are available for both Archive.org (the Wayback Machine) and WebCite.</ref> and [[Wikipedia:Using WebCite|WebCite]], which provides on-demand web archiving. These services collect and preserve web pages for future use even if the original web page is moved, changed, deleted, or placed behind a [[pay wall]]. Web archiving is especially important when [[WP:Citing sources|citing]] web pages that are unstable or prone to changes, like time sensitive [[news]] articles or pages hosted by financially distressed organizations. Once you have the URL for the archived version of the web page, use the <code>archiveurl=</code> and <code>archivedate=</code> parameters in the [[Wikipedia:Citation templates|citation template]] that you are using. The template will automatically incorporate the archived link into reference.
A quirk in the way the Wayback Machine operates means archived copies of sites sometimes become unavailable, for example, the [https://en.wikipedia.org/wiki/Freakonomics#Freakonomics_blog Freakonomics blog] previously hosted at <code>freakonomics.blogs.nytimes.com</code>. Those URLs were [https://web.archive.org/web/20130928002127/http://www.freakonomics.blogs.nytimes.com/robots.txt then] excluded from archiving by the New York Times' robots.txt file. This had the unfortunate effect of also rendering the previously archived content unavailable. But robots.txt changes can unhide that which previous changes have hidden, so do not delete an archiveURL solely because the archived content is currently unavailable. Luckily, in this case, not only can the content be found on a new site that is still open to archiving, but the site's robots.txt later [https://web.archive.org/web/20131217041219/http://freakonomics.com/robots.txt changed] to allow archiving again, and so the old archives are now unhidden ([https://web.archive.org/web/20070623110922/http://freakonomics.blogs.nytimes.com/ example]).
Most [[Wikipedia:Citation templates|citation templates]] have a <code>quote=</code> parameter that can be used to store text quotes of the source material. This can be used to store a limited amount of text from the source within the citation template. This is especially useful for sources that cannot be archived with web archiving services. It can also provide insurance against failure of the chosen web archiving service.