diff --git a/releasenotes/notes/additional-matcher-5c5cd466a6d70080.yaml b/releasenotes/notes/additional-matcher-5c5cd466a6d70080.yaml
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index 0000000..6a6d75b
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+++ b/releasenotes/notes/additional-matcher-5c5cd466a6d70080.yaml
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+---
+features:
+  - Allow specifying an `additional_matcher` to the mocker that will call a
+    function to allow a user to add their own custom request matching logic.