--- /dev/null
+#!/bin/sh
+
+printf '%s\r\n' "Content-Type: text/plain" ""
+
+for key in $(POST_KEYS); do case $key in
+ use_*)
+ use_iban="${use_iban} ${key#use_} "
+ ;;
+esac; done
+echo Use IBANS:
+echo "$use_iban"
+echo
+
+[ "$use_iban" ] && for key in $(POST_KEYS); do case $key in
+ check_*_*)
+ iban="${key#check_}" iban="${iban%_*}"
+ [ ! "${use_iban##* "${iban}" *}" ] && check="${check} ${key#check_} "
+ ;;
+esac; done
+echo Checked:
+echo "$check"
+echo
+
+for use in $check; do
+ iban="${use%_*}"
+ fn="$(POST "fn_${use}")"
+ echo Assign $iban to $fn
+done