diff --git a/Custom-Formats.md b/Custom-Formats.md
index 59b5fc9..1ed48fc 100644
--- a/Custom-Formats.md
+++ b/Custom-Formats.md
@@ -72,6 +72,9 @@ Radarr uses the following steps to find the best matching quality or custom form
     * S_Bluray (NO MATCH), R_1080 (MATCH) Will be discarded, since a source tag is present, but none of the source tags match
     * S_Bluray (NO MATCH), S_WEBDL (MATCH), R_1080 (MATCH) Will not be discarded, since at least one of the source tags matches
 
+Note that Radarr will try to match releases with all custom formats you created, whether they are checked or unchecked in profiles. Then, if the custom format is checked in profile, matching release will be accepted, if unchecked it will be rejected.
+See an example [here](https://github.com/Radarr/Radarr/wiki/How-to-make-sure-Radarr-doesnt-snatch-Full-BluRays) with a _bluray_ custom format.
+
 # Templates
 
 Radarr provides a wide range of predefined templates. They are explained below and sometimes have tips on customizing them.