diff --git a/pkg/apis/audit/types.go b/pkg/apis/audit/types.go
index 596e02202..f369b2229 100644
--- a/pkg/apis/audit/types.go
+++ b/pkg/apis/audit/types.go
@@ -98,6 +98,12 @@ type Event struct {
 	// +optional
 	ImpersonatedUser *authnv1.UserInfo
 	// Source IPs, from where the request originated and intermediate proxies.
+	// The source IPs are listed from (in order):
+	// 1. X-Forwarded-For request header IPs
+	// 2. X-Real-Ip header, if not present in the X-Forwarded-For list
+	// 3. The remote address for the connection, if it doesn't match the last
+	//    IP in the list up to here (X-Forwarded-For or X-Real-Ip).
+	// Note: All but the last IP can be arbitrarily set by the client.
 	// +optional
 	SourceIPs []string
 	// UserAgent records the user agent string reported by the client.
diff --git a/pkg/apis/audit/v1/generated.proto b/pkg/apis/audit/v1/generated.proto
index ab77d190e..8cdb12cdf 100644
--- a/pkg/apis/audit/v1/generated.proto
+++ b/pkg/apis/audit/v1/generated.proto
@@ -55,6 +55,12 @@ message Event {
   optional k8s.io.api.authentication.v1.UserInfo impersonatedUser = 7;
 
   // Source IPs, from where the request originated and intermediate proxies.
+  // The source IPs are listed from (in order):
+  // 1. X-Forwarded-For request header IPs
+  // 2. X-Real-Ip header, if not present in the X-Forwarded-For list
+  // 3. The remote address for the connection, if it doesn't match the last
+  //    IP in the list up to here (X-Forwarded-For or X-Real-Ip).
+  // Note: All but the last IP can be arbitrarily set by the client.
   // +optional
   repeated string sourceIPs = 8;
 
diff --git a/pkg/apis/audit/v1/types.go b/pkg/apis/audit/v1/types.go
index 3f70ebaa5..27f4729ea 100644
--- a/pkg/apis/audit/v1/types.go
+++ b/pkg/apis/audit/v1/types.go
@@ -91,6 +91,12 @@ type Event struct {
 	// +optional
 	ImpersonatedUser *authnv1.UserInfo `json:"impersonatedUser,omitempty" protobuf:"bytes,7,opt,name=impersonatedUser"`
 	// Source IPs, from where the request originated and intermediate proxies.
+	// The source IPs are listed from (in order):
+	// 1. X-Forwarded-For request header IPs
+	// 2. X-Real-Ip header, if not present in the X-Forwarded-For list
+	// 3. The remote address for the connection, if it doesn't match the last
+	//    IP in the list up to here (X-Forwarded-For or X-Real-Ip).
+	// Note: All but the last IP can be arbitrarily set by the client.
 	// +optional
 	SourceIPs []string `json:"sourceIPs,omitempty" protobuf:"bytes,8,rep,name=sourceIPs"`
 	// UserAgent records the user agent string reported by the client.