diff --git a/check-last-incs.sh b/check-last-incs.sh
new file mode 100644
index 0000000..cefcb89
--- /dev/null
+++ b/check-last-incs.sh
@@ -0,0 +1,20 @@
+#!/bin/sh
+
+inc_exists() {
+    ls -d /backup/incs/$1 > /dev/null 2>&1
+}
+# default return value is 0 (succes)
+rc=0
+# loop for each found jail
+for file in /backup/jails/*; do
+    jail_name=$(basename ${file})
+    # inc date in seconds from epoch
+    inc_date=$(date --date "yesterday" +"%Y-%m-%d")
+    # Error if inc is not found
+    if ! inc_exists ${jail_name}/${inc_date}*; then
+        echo "ERROR: inc is missing \`${jail_name}/${inc_date}'" >&2
+        rc=1
+    fi
+done
+
+exit $rc