diff --git a/doc/releases/migration-guide-3.6.rst b/doc/releases/migration-guide-3.6.rst
index e3daffe35ab..059b487a921 100644
--- a/doc/releases/migration-guide-3.6.rst
+++ b/doc/releases/migration-guide-3.6.rst
@@ -202,6 +202,10 @@ Networking
   ``request`` argument for :c:func:`coap_well_known_core_get` is made ``const``.
   (:github:`64265`)
 
+* CoAP observer events have moved from a callback function in a CoAP resource to the Network Events
+  subsystem. The ``CONFIG_COAP_OBSERVER_EVENTS`` configuration option has been removed.
+  (:github:`65936`)
+
 * The IGMP multicast library now supports IGMPv3. This results in a minor change to the existing
   api. The :c:func:`net_ipv4_igmp_join` now takes an additional argument of the type
   ``const struct igmp_param *param``. This allows IGMPv3 to exclude/include certain groups of
diff --git a/doc/releases/release-notes-3.6.rst b/doc/releases/release-notes-3.6.rst
index a0be585f618..3295a128ded 100644
--- a/doc/releases/release-notes-3.6.rst
+++ b/doc/releases/release-notes-3.6.rst
@@ -206,6 +206,8 @@ Networking
 
 * CoAP:
 
+  * Emit observer/service network events using the Network Event subsystem.
+
 * Connection Manager:
 
 * DHCP: