diff --git a/releasenotes/notes/show-note-filename-in-report-a1118c917588b58d.yaml b/releasenotes/notes/show-note-filename-in-report-a1118c917588b58d.yaml
new file mode 100644
index 0000000..286b754
--- /dev/null
+++ b/releasenotes/notes/show-note-filename-in-report-a1118c917588b58d.yaml
@@ -0,0 +1,7 @@
+---
+features:
+  - |
+    The report output now includes debugging details with the filename
+    and sha for the version of the content used to indicate where the
+    content is from to assist with debugging formatting or content
+    issues.
diff --git a/reno/formatter.py b/reno/formatter.py
index aebe6f2..b6d43ec 100644
--- a/reno/formatter.py
+++ b/reno/formatter.py
@@ -49,12 +49,13 @@ def format_report(loader, config, versions_to_include, title=None):
         notefiles = loader[version]
         for n, sha in notefiles:
             if 'prelude' in file_contents[n]:
+                report.append('.. %s @ %s\n' % (n, sha))
                 report.append(file_contents[n]['prelude'])
                 report.append('')
 
         for section_name, section_title in config.sections:
             notes = [
-                n
+                (n, fn, sha)
                 for fn, sha in notefiles
                 if file_contents[fn].get(section_name)
                 for n in file_contents[fn].get(section_name, [])
@@ -63,7 +64,8 @@ def format_report(loader, config, versions_to_include, title=None):
                 report.append(section_title)
                 report.append('-' * len(section_title))
                 report.append('')
-                for n in notes:
+                for n, fn, sha in notes:
+                    report.append('.. %s @ %s\n' % (fn, sha))
                     report.append('- %s' % _indent_for_list(n))
                 report.append('')