diff --git a/internal/coreinternal/errorutil/http.go b/internal/coreinternal/errorutil/http.go
index 571e555e9773..930f0fd51fcd 100644
--- a/internal/coreinternal/errorutil/http.go
+++ b/internal/coreinternal/errorutil/http.go
@@ -17,6 +17,12 @@ func HTTPError(w http.ResponseWriter, err error) {
 }
 
 func GetHTTPStatusCodeFromError(err error) int {
+	// See requirements for receviers
+	// https://github.com/open-telemetry/opentelemetry-collector/blob/8e522ad950de6326a0841d7e1bef808bbc0d3537/receiver/doc.go#L10-L29
+
+	// See https://github.com/open-telemetry/opentelemetry-proto/blob/main/docs/specification.md#failures-1
+	// to see a list of retryable http status codes.
+
 	// non-retryable status
 	status := http.StatusBadRequest
 	if !consumererror.IsPermanent(err) {