diff --git a/docs/curl.1 b/docs/curl.1
index f0790e5473181f9a730a701853e6ad8328b54033..4b6ca4ffd2ad8815d3b93caaae15899daa10b192 100644
--- a/docs/curl.1
+++ b/docs/curl.1
@@ -110,6 +110,12 @@ no file will be written. The file will be written using the Netscape cookie
 file format. If you set the file name to a single dash, "-", the cookies will
 be written to stdout. (Option added in curl 7.9)
 
+.B NOTE
+If the cookie jar can't be created or written to, the whole curl operation
+won't fail or even report an error clearly. Using -v will get a warning
+displayed, but that is the only visible feedback you get about this possibly
+lethal situation.
+
 If this option is used several times, the last specfied file name will be
 used.
 .IP "-C/--continue-at <offset>"
diff --git a/docs/libcurl/curl_easy_setopt.3 b/docs/libcurl/curl_easy_setopt.3
index 4763c871a68f555526db93bfea2850449da3c58d..c8720c27ade7db3ca834b4e258f3392cacd7f27a 100644
--- a/docs/libcurl/curl_easy_setopt.3
+++ b/docs/libcurl/curl_easy_setopt.3
@@ -478,6 +478,13 @@ is called. If no cookies are known, no file will be created. Specify "-" to
 instead have the cookies written to stdout. Using this option also enables
 cookies for this session, so if you for example follow a location it will make
 matching cookies get sent accordingly. (Added in 7.9)
+
+.B NOTE
+If the cookie jar file can't be created or written to (when the
+curl_easy_cleanup() is called), libcurl will not and cannot report an error
+for this. Using CURLOPT_VERBOSE or CURLOPT_DEBUGFUNCTION will get a warning to
+display, but that is the only visible feedback you get about this possibly
+lethal situation.
 .TP
 .B CURLOPT_TIMECONDITION
 Pass a long as parameter. This defines how the CURLOPT_TIMEVALUE time value is