diff --git a/config/includes.chroot/usr/lib/live/boot/0030-ciss-verify-checksums b/config/includes.chroot/usr/lib/live/boot/0030-ciss-verify-checksums
index 63d9d29..5fcf0e1 100644
--- a/config/includes.chroot/usr/lib/live/boot/0030-ciss-verify-checksums
+++ b/config/includes.chroot/usr/lib/live/boot/0030-ciss-verify-checksums
@@ -89,9 +89,20 @@ Verify_checksums() {
 
   _KEYFILE=""
 
+  _MANIFEST_FOUND="false"
+
   _MP=""
 
+  _RETURN_PGP=""
+
+  _RETURN_SHA=""
+
+  _VERIFICATION_EXECUTED="false"
+
+  _VERIFICATION_SUCCEEDED="false"
+
   ### Parse commandline arguments ----------------------------------------------------------------------------------------------
+  # shellcheck disable=SC2154
   for _PARAMETER in ${LIVE_BOOT_CMDLINE}; do
 
     case "${_PARAMETER}" in
@@ -244,10 +255,12 @@ Verify_checksums() {
 
       if [ -e "${_CHECKSUM}" ]; then
 
+        _MANIFEST_FOUND="true"
         log_in "Found: [${_CHECKSUM}] ..."
 
         if [ -e "/usr/bin/${_DIGEST}sum" ]; then
 
+          _VERIFICATION_EXECUTED="true"
           log_in "Found: [/usr/bin/${_DIGEST}sum] ..."
 
           if [ "${LIVE_VERIFY_CHECKSUMS_SIGNATURES}" = "true" ]; then
@@ -279,6 +292,7 @@ Verify_checksums() {
           if grep -v '^#' "${_CHECKSUM}" | LC_ALL=C /usr/bin/"${_DIGEST}"sum -c > "${_CHECKSUM_LOG}" 2>&1; then
 
             _RETURN_SHA="${?}"
+            _VERIFICATION_SUCCEEDED="true"
             cat "${_CHECKSUM_LOG}" > "${_TTY}"
             log_ok "Found: [/usr/bin/${_DIGEST}sum] successful verified: [${_CHECKSUM}]"
 
@@ -313,6 +327,33 @@ Verify_checksums() {
   log_end_msg
   printf "\n"
 
+  if [ "${_MANIFEST_FOUND}" != "true" ]; then
+
+    log_er "No supported checksum manifest found."
+    sleep 8
+    panic  "No supported checksum manifest found."
+    return 1
+
+  fi
+
+  if [ "${_VERIFICATION_EXECUTED}" != "true" ]; then
+
+    log_er "No supported checksum verification tool was available."
+    sleep 8
+    panic  "No supported checksum verification tool was available."
+    return 1
+
+  fi
+
+  if [ "${_VERIFICATION_SUCCEEDED}" != "true" ]; then
+
+    log_er "No supported checksum manifest was verified successfully."
+    sleep 8
+    panic  "No supported checksum manifest was verified successfully."
+    return 1
+
+  fi
+
   case "${_RETURN_PGP},${_RETURN_SHA}" in
 
     "0,0")
@@ -331,18 +372,28 @@ Verify_checksums() {
       log_er "Verification of [GPG signature] file successful, while verification of [sha checksum] file failed."
       sleep 8
       panic  "Verification of [GPG signature] file successful, while verification of [sha checksum] file failed."
+      return 1
       ;;
 
     *",0")
       log_er "Verification of [GPG signature] file failed, while verification of [sha checksum] file successful."
       sleep 8
       panic  "Verification of [GPG signature] file failed, while verification of [sha checksum] file successful."
+      return 1
       ;;
 
     "na,"*)
       log_er "Verification of [sha checksum] file failed."
       sleep 8
       panic  "Verification of [sha checksum] file failed."
+      return 1
+      ;;
+
+    *)
+      log_er "Checksum verification ended in an unsupported state."
+      sleep 8
+      panic  "Checksum verification ended in an unsupported state."
+      return 1
       ;;
 
   esac
diff --git a/scripts/usr/lib/live/boot/0030-ciss-verify-checksums b/scripts/usr/lib/live/boot/0030-ciss-verify-checksums
index 8bc8a80..8578df9 100644
--- a/scripts/usr/lib/live/boot/0030-ciss-verify-checksums
+++ b/scripts/usr/lib/live/boot/0030-ciss-verify-checksums
@@ -48,9 +48,20 @@ Verify_checksums() {
 
   _KEYFILE=""
 
+  _MANIFEST_FOUND="false"
+
   _MP=""
 
+  _RETURN_PGP=""
+
+  _RETURN_SHA=""
+
+  _VERIFICATION_EXECUTED="false"
+
+  _VERIFICATION_SUCCEEDED="false"
+
   ### Parse commandline arguments ----------------------------------------------------------------------------------------------
+  # shellcheck disable=SC2154
   for _PARAMETER in ${LIVE_BOOT_CMDLINE}; do
 
     case "${_PARAMETER}" in
@@ -203,10 +214,12 @@ Verify_checksums() {
 
       if [ -e "${_CHECKSUM}" ]; then
 
+        _MANIFEST_FOUND="true"
         printf "\e[95m[INFO] Found: [%s] ... \n\e[0m" "${_CHECKSUM}"
 
         if [ -e "/usr/bin/${_DIGEST}sum" ]; then
 
+          _VERIFICATION_EXECUTED="true"
           printf "\e[95m[INFO] Found: [%s] ... \n\e[0m" "/usr/bin/${_DIGEST}sum"
 
           if [ "${LIVE_VERIFY_CHECKSUMS_SIGNATURES}" = "true" ]; then
@@ -237,6 +250,7 @@ Verify_checksums() {
           if grep -v '^#' "${_CHECKSUM}" | /usr/bin/"${_DIGEST}"sum -c > "${_TTY}"; then
 
             _RETURN_SHA="${?}"
+            _VERIFICATION_SUCCEEDED="true"
             printf "\e[92m[INFO] Found: [%s] successful verified: [%s] \n\e[0m" "/usr/bin/${_DIGEST}sum" "${_CHECKSUM}"
 
           else
@@ -265,6 +279,33 @@ Verify_checksums() {
   log_end_msg
   printf "\n"
 
+  if [ "${_MANIFEST_FOUND}" != "true" ]; then
+
+    printf "\e[91m[FATAL] No supported checksum manifest found. \n\e[0m"
+    sleep 8
+    panic "No supported checksum manifest found."
+    return 1
+
+  fi
+
+  if [ "${_VERIFICATION_EXECUTED}" != "true" ]; then
+
+    printf "\e[91m[FATAL] No supported checksum verification tool was available. \n\e[0m"
+    sleep 8
+    panic "No supported checksum verification tool was available."
+    return 1
+
+  fi
+
+  if [ "${_VERIFICATION_SUCCEEDED}" != "true" ]; then
+
+    printf "\e[91m[FATAL] No supported checksum manifest was verified successfully. \n\e[0m"
+    sleep 8
+    panic "No supported checksum manifest was verified successfully."
+    return 1
+
+  fi
+
   case "${_RETURN_PGP},${_RETURN_SHA}" in
 
     "0,0")
@@ -288,6 +329,7 @@ Verify_checksums() {
       printf "\e[91m[FATAL] CDLB modified: [%s] done. \n\e[0m" "${CDLB_SCRIPT_FULL}"
       sleep 8
       panic "Verification of [GPG signature] file successful, while verification of [sha checksum] file failed."
+      return 1
       ;;
 
     *",0")
@@ -295,6 +337,7 @@ Verify_checksums() {
       printf "\e[91m[FATAL] CDLB modified: [%s] done. \n\e[0m" "${CDLB_SCRIPT_FULL}"
       sleep 8
       panic "Verification of [GPG signature] file failed, while verification of [sha checksum] file successful."
+      return 1
       ;;
 
     "na,"*)
@@ -302,6 +345,14 @@ Verify_checksums() {
       printf "\e[91m[FATAL] CDLB modified: [%s] done. \n\e[0m" "${CDLB_SCRIPT_FULL}"
       sleep 8
       panic "Verification of checksum file failed."
+      return 1
+      ;;
+
+    *)
+      printf "\e[91m[FATAL] Checksum verification ended in an unsupported state. \n\e[0m"
+      sleep 8
+      panic "Checksum verification ended in an unsupported state."
+      return 1
       ;;
 
   esac