diff --git a/dhl.sh b/dhl.sh
index c7b0aed..67abd8f 100755
--- a/dhl.sh
+++ b/dhl.sh
@@ -1,5 +1,5 @@
 #!/usr/bin/env sh
-dependencies="sed test cp libreoffice expr cut"
+dependencies="sed test cp libreoffice expr cut file"
 
 # target filename
 tn1="dhl-cp1252-n.csv"
@@ -170,30 +170,42 @@ runtests () {
 }
 runtests
 
+exit 0
+
+# untested:
+
 # todo: download file (its UTF-8 encoded)
 
 fn="dhl.csv"
 # backup
 cp -f "$fn" "${fn}.bak"
 
-exit 0;
+
 
 # replace special spaces and hyphens
 sed -i -e 's/[\u00A0\u202F[:space:]]+/ /g' -e 's/[\u2010\u2011\u2012\u2013\u002D]+/-/g' -e 's/[\u00AD\uFEFF]+//g' "$fn"
+# todo: add quote variants
+# todo: check for delimiters that may conflict during conversion
 
-# convert encoding from UTF-8 to CP1252 "Windows"
-# another possibility for conversion? seems not to be relyable: iconv -o "$of" -f UTF-8 -t CP1252 "$if" 
+# convert encoding from UTF-8 to CP1252 / WINDOWS-1252
+# another possibility for conversion? seems not to be relyable: iconv -o "$of" -f UTF-8 -t WINDOWS-1252 "$if" 
 convcsv () {
-	if test $# -eq 0 ; then echo "argument missing."; exit 1; fi
-	if test -e $1 ; then echo "file already exists."; exit 2; fi 
+	if test $# -eq 0 ; then >&2 echo "argument missing."; exit 1; fi
 # doc for headless conversion options https://wiki.openoffice.org/wiki/Documentation/DevGuide/Spreadsheets/Filter_Options
 	if="${1}"
+	format=$(file ${if}|cut -d' ' -f2)
+	if test "$format" != "UTF-8" ; then >&2 echo "source file encoding not matching the expected UTF-8."; fi
 	of=$(echo "${if}"|rev|cut -d. -f2-|rev)".ods"
+	if test -e $of ; then >&2 echo "output file already exists."; exit 2; fi 
+	#~ iconv -o "$of" -f $format -t WINDOWS-1252 "$if"
+	# to take care of more options in csv at the same time, convert to ods and back to csv
 	libreoffice --headless --convert-to ods --infilter=CSV:59,34,76,1 "${if}" && {
 		mv "${if}" "${if}.bak"
 		libreoffice --headless --infilter=CSV:59,34,76,1 --convert-to csv:"Text - txt - csv (StarCalc)":"44,34,1,0,1,,0" "${tf}" && {
 			rm "${tf}" "${if}.bak"
 		}
 	}
+	format=$(file ${if}|cut -d' ' -f2)
+	if test "$format" != "Non-ISO" ; then >&2 echo "output file encoding not matching the expected Non-ISO, its $format."; fi
 }
 convcsv "$fn"