diff --git a/Scripts/Billing/private.pem b/Scripts/Billing/private.pem
new file mode 100644
index 0000000..ea93433
--- /dev/null
+++ b/Scripts/Billing/private.pem
@@ -0,0 +1,27 @@
+-----BEGIN RSA PRIVATE KEY-----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+-----END RSA PRIVATE KEY-----

diff --git a/Scripts/Billing/private.pem b/Scripts/Billing/private.pem
new file mode 100644
index 0000000..ea93433
--- /dev/null
+++ b/Scripts/Billing/private.pem
@@ -0,0 +1,27 @@
+-----BEGIN RSA PRIVATE KEY-----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+-----END RSA PRIVATE KEY-----
diff --git a/Scripts/Billing/process-order.sh b/Scripts/Billing/process-order.sh
new file mode 100755
index 0000000..a461c2d
--- /dev/null
+++ b/Scripts/Billing/process-order.sh
@@ -0,0 +1,179 @@
+#!/bin/bash
+
+BILLING_PATH="$HOME/Code/code/Scripts/Billing"
+OUTPUT=`$BILLING_PATH/dkim-verify.sh test.txt`
+RESULT=$?
+if [ "$RESULT" != "0" ]
+then
+	echo "DKIM check failed"
+	exit $RESULT
+fi
+
+KEY=`echo $OUTPUT | cut -d '=' -f 1`
+VAL=`echo $OUTPUT | cut -d '=' -f 2- | cut -d ' ' -f 1`
+if [ "$KEY" == "TEMPDIR" ]
+then
+	TEMPDIR=$VAL		
+fi
+
+# echo "tempdir = -$TEMPDIR-"
+
+echo > $TEMPDIR/check-params.sh
+cat $TEMPDIR/cheaders.txt | while read LINE
+do
+	KEY=`echo $LINE | cut -d ':' -f 1`
+	VAL=`echo $LINE | cut -d ':' -f 2-`
+	[ "$KEY" == "reply-to" ] && echo "REPLYTO_EMAIL='$VAL'" >> $TEMPDIR/check-params.sh
+	[ "$KEY" == "content-type" ] && echo "CONTENT_TYPE='$VAL'" >> $TEMPDIR/check-params.sh
+done
+
+# We are expecting that PayPal will DKIM sign the from and subject fields and so we search
+# for those fields in dkim-headers.dos so we only detect them if they were signed
+# If they are not in the dkim-headers that are signed, then the idea is that the rest of 
+# the script will fail as the names and emails will mis-match
+cat $TEMPDIR/dkim-headers.dos | while read LINE
+do
+	KEY=`echo $LINE | cut -d ':' -f 1`
+	VAL=`echo $LINE | cut -d ':' -f 2-`
+	[ "$KEY" == "from" ] && echo "$VAL" | sed 's/\(.*\) via PayPal.*/FROM_NAME='\''\1'\''/' >> $TEMPDIR/check-params.sh
+	[ "$KEY" == "subject" ] && echo "$VAL" | sed 's/\(.*\) - Notification of Payment Received from \(.*\) (\(.*\)).*/ITEM='\''\1'\''\nSENDER_NAME='\''\2'\''\nSENDER_EMAIL='\''\3'\''\n/' >> $TEMPDIR/check-params.sh
+done
+echo >> $TEMPDIR/check-params.sh
+
+. $TEMPDIR/check-params.sh
+
+echo > $TEMPDIR/plain-body.txt
+MULTIPART_TYPE=`echo "$CONTENT_TYPE" | cut -d ';' -f 1`
+if [ "$MULTIPART_TYPE" == "multipart/alternative" ]
+then
+	MULTIPART_SEPERATOR=`echo "$CONTENT_TYPE" | cut -d ';' -f 2- | cut -d '=' -f 2`
+	PART=0
+	cat $TEMPDIR/body.txt | while read LINE
+	do
+		[ "$PART" == "1" ] && echo "$LINE" >> $TEMPDIR/plain-body.txt
+		[ "$PART" == "1" ] && [ "$LINE" == "--$MULTIPART_SEPERATOR" ] && break
+		[ "$PART" == "0" ] && [ "$LINE" == "--$MULTIPART_SEPERATOR" ] && PART=1
+	done
+else
+	cat $TEMPDIR/body.txt >> $TEMPDIR/plain-body.txt
+fi
+
+cat $TEMPDIR/plain-body.txt | perl -pe 'use MIME::QuotedPrint; $_=MIME::QuotedPrint::decode($_);' > $TEMPDIR/plain.txt
+
+STATE=0
+echo > $TEMPDIR/vals.sh
+cat $TEMPDIR/plain.txt | while read LINE
+do
+	KEY=`echo $LINE | cut -d ':' -f 1`
+	VAL=`echo $LINE | cut -d ':' -f 2- | sed 's/[ \t]*\(.*\)/\1/'`
+	[ "$LINE" == "" ] && STATE=0
+	[ "$STATE" == "2" ] && echo "BUYER_EMAIL='$LINE'" >> $TEMPDIR/vals.sh && STATE=0
+	[ "$STATE" == "1" ] && echo "BUYER_NAME='$LINE'" >> $TEMPDIR/vals.sh && STATE=2
+	[ "$LINE" == "Buyer:" ] && STATE=1
+	[ "$STATE" == "3" ] && echo "SHIPPING=\$SHIPPING' | $LINE'" >> $TEMPDIR/vals.sh
+	[ "$LINE" == "Shipping address:" ] && STATE=3
+	[ "$KEY" == "Description" ]     && echo "DESC='$VAL'" >> $TEMPDIR/vals.sh
+	[ "$KEY" == "Qty" ]             && echo "QTY='$VAL'" >> $TEMPDIR/vals.sh
+	[ "$KEY" == "Unit price" ]      && echo "UNIT_PRICE='$VAL'" >> $TEMPDIR/vals.sh
+	[ "$KEY" == "Total" ]           && echo "PRICE='$VAL'" >> $TEMPDIR/vals.sh
+	[ "$KEY" == "Payment" ]         && echo "PAID='$VAL'" >> $TEMPDIR/vals.sh
+	[ "$KEY" == "Payment sent to" ] && echo "ME='$VAL'" >> $TEMPDIR/vals.sh
+done
+
+. $TEMPDIR/vals.sh
+
+if [ "$ME" != "billing@subflexion.com" ]
+then
+	echo "Wrong account:"
+	echo "  -$ME- is not -billing@subflexion.com- "
+	echo "  Or perhaps the email isn't formatted as expected, perhaps paypal have changed the format?"
+	exit -1
+fi
+if [ "$SENDER_NAME" != "$FROM_NAME" ]
+then
+	echo "Name mismatch:"
+	echo "  -$SENDER_NAME- is not -$FROM_NAME- "
+	echo "  Perhaps the from or subject header fields were not signed, so can we really trust this email?"
+	exit -1
+fi
+if [ "$REPLYTO_EMAIL" != "$SENDER_EMAIL" ]
+then
+	echo "Email mismatch:"
+	echo "  -$REPLYTO_EMAIL- is not -$SENDER_EMAIL- "
+	echo "  Perhaps the from or subject header fields were not signed, so can we really trust this email?"
+	exit -1
+fi
+if [ "$SENDER_NAME" != "$BUYER_NAME" ]
+then
+	echo "Name mismatch:"
+	echo "  -$SENDER_NAME- is not -$BUYER_NAME- "
+	echo "  The email doesn't not appear to be formatted as expected, perhaps paypal have changed the format"
+	exit -1
+fi
+if [ "$BUYER_EMAIL" != "$SENDER_EMAIL" ]
+then
+	echo "Email mismatch:"
+	echo "  -$BUYER_EMAIL- is not -$SENDER_EMAIL- "
+	echo "  The email doesn't not appear to be formatted as expected, perhaps paypal have changed the format"
+	exit -1
+fi
+
+if [ "$ITEM" == "Item no.v1.0" ]
+then
+	echo "Found requested stock item"
+	if [ "$UNIT_PRICE" != "\$0.99 USD" ]
+	then
+		echo "Price mismatch:"
+		echo "  -$UNIT_PRICE- != \$0.99 USD"
+		echo "  Prices changed, but this script not updated?"
+		echo "  Or potentially someone is trying to make a paypal payment with the correct details except for the price" 
+		exit -1
+	fi
+	# TODO: calculate that the total price is the correctly calculated product of the unit price by the quantitya
+else
+	exit -1
+fi
+
+echo "Generating license..."
+
+echo > $TEMPDIR/license.txt
+echo "PRODUCT=$DESC" >> $TEMPDIR/license.txt
+echo "COUNT=$QTY" >> $TEMPDIR/license.txt
+echo "ID=`uuidgen`" >> $TEMPDIR/license.txt
+echo "NAME=$BUYER_NAME" >> $TEMPDIR/license.txt
+echo "EMAIL=$BUYER_EMAIL" >> $TEMPDIR/license.txt
+echo "ADDRESS_LINE1=`echo $SHIPPING | cut -d '|' -f 2 | sed 's/[ \t]*\(.*\)/\1/'`" >> $TEMPDIR/license.txt
+echo "ADDRESS_LINE2=`echo $SHIPPING | cut -d '|' -f 3 | sed 's/[ \t]*\(.*\)/\1/'`" >> $TEMPDIR/license.txt
+echo "ADDRESS_LINE3=`echo $SHIPPING | cut -d '|' -f 4 | sed 's/[ \t]*\(.*\)/\1/'`" >> $TEMPDIR/license.txt
+echo "ADDRESS_LINE4=`echo $SHIPPING | cut -d '|' -f 5 | sed 's/[ \t]*\(.*\)/\1/'`" >> $TEMPDIR/license.txt
+echo "ADDRESS_LINE5=`echo $SHIPPING | cut -d '|' -f 6 | sed 's/[ \t]*\(.*\)/\1/'`" >> $TEMPDIR/license.txt
+
+# openssl genrsa -out $BILLING_PATH/private.pem 2048 > /dev/null
+# openssl rsa -in $BILLING_PATH/private.pem -outform PEM -pubout -out $BILLING_PATH/public.pem 
+
+cat $TEMPDIR/license.txt | openssl dgst -keyform pem -sha256 -sign $BILLING_PATH/private.pem > $TEMPDIR/sig.bin
+
+cat $TEMPDIR/license.txt | openssl dgst -keyform pem -sha256 -verify $BILLING_PATH/public.pem -signature $TEMPDIR/sig.bin
+
+SIG=`cat $TEMPDIR/sig.bin | base64 -w 50`
+
+echo "SIGNATURE_LINE1=`echo $SIG | tr ' ' '\n' | head -n 1 | tail -n 1`" >> $TEMPDIR/license.txt
+echo "SIGNATURE_LINE2=`echo $SIG | tr ' ' '\n' | head -n 2 | tail -n 1`" >> $TEMPDIR/license.txt
+echo "SIGNATURE_LINE3=`echo $SIG | tr ' ' '\n' | head -n 3 | tail -n 1`" >> $TEMPDIR/license.txt
+echo "SIGNATURE_LINE4=`echo $SIG | tr ' ' '\n' | head -n 4 | tail -n 1`" >> $TEMPDIR/license.txt
+echo "SIGNATURE_LINE5=`echo $SIG | tr ' ' '\n' | head -n 5 | tail -n 1`" >> $TEMPDIR/license.txt
+echo "SIGNATURE_LINE6=`echo $SIG | tr ' ' '\n' | head -n 6 | tail -n 1`" >> $TEMPDIR/license.txt
+echo "SIGNATURE_LINE7=`echo $SIG | tr ' ' '\n' | head -n 7 | tail -n 1`" >> $TEMPDIR/license.txt
+
+cat $TEMPDIR/license.txt
+
+# Cleanup temporary files
+if [ -d "$TEMPDIR" ]
+then
+	if [ `dirname $TEMPDIR` == "$HOME/tmp" ]
+	then
+		rm -rf $TEMPDIR
+	fi
+fi
+
+

diff --git a/Scripts/Billing/private.pem b/Scripts/Billing/private.pem
new file mode 100644
index 0000000..ea93433
--- /dev/null
+++ b/Scripts/Billing/private.pem
@@ -0,0 +1,27 @@
+-----BEGIN RSA PRIVATE KEY-----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+-----END RSA PRIVATE KEY-----
diff --git a/Scripts/Billing/process-order.sh b/Scripts/Billing/process-order.sh
new file mode 100755
index 0000000..a461c2d
--- /dev/null
+++ b/Scripts/Billing/process-order.sh
@@ -0,0 +1,179 @@
+#!/bin/bash
+
+BILLING_PATH="$HOME/Code/code/Scripts/Billing"
+OUTPUT=`$BILLING_PATH/dkim-verify.sh test.txt`
+RESULT=$?
+if [ "$RESULT" != "0" ]
+then
+	echo "DKIM check failed"
+	exit $RESULT
+fi
+
+KEY=`echo $OUTPUT | cut -d '=' -f 1`
+VAL=`echo $OUTPUT | cut -d '=' -f 2- | cut -d ' ' -f 1`
+if [ "$KEY" == "TEMPDIR" ]
+then
+	TEMPDIR=$VAL		
+fi
+
+# echo "tempdir = -$TEMPDIR-"
+
+echo > $TEMPDIR/check-params.sh
+cat $TEMPDIR/cheaders.txt | while read LINE
+do
+	KEY=`echo $LINE | cut -d ':' -f 1`
+	VAL=`echo $LINE | cut -d ':' -f 2-`
+	[ "$KEY" == "reply-to" ] && echo "REPLYTO_EMAIL='$VAL'" >> $TEMPDIR/check-params.sh
+	[ "$KEY" == "content-type" ] && echo "CONTENT_TYPE='$VAL'" >> $TEMPDIR/check-params.sh
+done
+
+# We are expecting that PayPal will DKIM sign the from and subject fields and so we search
+# for those fields in dkim-headers.dos so we only detect them if they were signed
+# If they are not in the dkim-headers that are signed, then the idea is that the rest of 
+# the script will fail as the names and emails will mis-match
+cat $TEMPDIR/dkim-headers.dos | while read LINE
+do
+	KEY=`echo $LINE | cut -d ':' -f 1`
+	VAL=`echo $LINE | cut -d ':' -f 2-`
+	[ "$KEY" == "from" ] && echo "$VAL" | sed 's/\(.*\) via PayPal.*/FROM_NAME='\''\1'\''/' >> $TEMPDIR/check-params.sh
+	[ "$KEY" == "subject" ] && echo "$VAL" | sed 's/\(.*\) - Notification of Payment Received from \(.*\) (\(.*\)).*/ITEM='\''\1'\''\nSENDER_NAME='\''\2'\''\nSENDER_EMAIL='\''\3'\''\n/' >> $TEMPDIR/check-params.sh
+done
+echo >> $TEMPDIR/check-params.sh
+
+. $TEMPDIR/check-params.sh
+
+echo > $TEMPDIR/plain-body.txt
+MULTIPART_TYPE=`echo "$CONTENT_TYPE" | cut -d ';' -f 1`
+if [ "$MULTIPART_TYPE" == "multipart/alternative" ]
+then
+	MULTIPART_SEPERATOR=`echo "$CONTENT_TYPE" | cut -d ';' -f 2- | cut -d '=' -f 2`
+	PART=0
+	cat $TEMPDIR/body.txt | while read LINE
+	do
+		[ "$PART" == "1" ] && echo "$LINE" >> $TEMPDIR/plain-body.txt
+		[ "$PART" == "1" ] && [ "$LINE" == "--$MULTIPART_SEPERATOR" ] && break
+		[ "$PART" == "0" ] && [ "$LINE" == "--$MULTIPART_SEPERATOR" ] && PART=1
+	done
+else
+	cat $TEMPDIR/body.txt >> $TEMPDIR/plain-body.txt
+fi
+
+cat $TEMPDIR/plain-body.txt | perl -pe 'use MIME::QuotedPrint; $_=MIME::QuotedPrint::decode($_);' > $TEMPDIR/plain.txt
+
+STATE=0
+echo > $TEMPDIR/vals.sh
+cat $TEMPDIR/plain.txt | while read LINE
+do
+	KEY=`echo $LINE | cut -d ':' -f 1`
+	VAL=`echo $LINE | cut -d ':' -f 2- | sed 's/[ \t]*\(.*\)/\1/'`
+	[ "$LINE" == "" ] && STATE=0
+	[ "$STATE" == "2" ] && echo "BUYER_EMAIL='$LINE'" >> $TEMPDIR/vals.sh && STATE=0
+	[ "$STATE" == "1" ] && echo "BUYER_NAME='$LINE'" >> $TEMPDIR/vals.sh && STATE=2
+	[ "$LINE" == "Buyer:" ] && STATE=1
+	[ "$STATE" == "3" ] && echo "SHIPPING=\$SHIPPING' | $LINE'" >> $TEMPDIR/vals.sh
+	[ "$LINE" == "Shipping address:" ] && STATE=3
+	[ "$KEY" == "Description" ]     && echo "DESC='$VAL'" >> $TEMPDIR/vals.sh
+	[ "$KEY" == "Qty" ]             && echo "QTY='$VAL'" >> $TEMPDIR/vals.sh
+	[ "$KEY" == "Unit price" ]      && echo "UNIT_PRICE='$VAL'" >> $TEMPDIR/vals.sh
+	[ "$KEY" == "Total" ]           && echo "PRICE='$VAL'" >> $TEMPDIR/vals.sh
+	[ "$KEY" == "Payment" ]         && echo "PAID='$VAL'" >> $TEMPDIR/vals.sh
+	[ "$KEY" == "Payment sent to" ] && echo "ME='$VAL'" >> $TEMPDIR/vals.sh
+done
+
+. $TEMPDIR/vals.sh
+
+if [ "$ME" != "billing@subflexion.com" ]
+then
+	echo "Wrong account:"
+	echo "  -$ME- is not -billing@subflexion.com- "
+	echo "  Or perhaps the email isn't formatted as expected, perhaps paypal have changed the format?"
+	exit -1
+fi
+if [ "$SENDER_NAME" != "$FROM_NAME" ]
+then
+	echo "Name mismatch:"
+	echo "  -$SENDER_NAME- is not -$FROM_NAME- "
+	echo "  Perhaps the from or subject header fields were not signed, so can we really trust this email?"
+	exit -1
+fi
+if [ "$REPLYTO_EMAIL" != "$SENDER_EMAIL" ]
+then
+	echo "Email mismatch:"
+	echo "  -$REPLYTO_EMAIL- is not -$SENDER_EMAIL- "
+	echo "  Perhaps the from or subject header fields were not signed, so can we really trust this email?"
+	exit -1
+fi
+if [ "$SENDER_NAME" != "$BUYER_NAME" ]
+then
+	echo "Name mismatch:"
+	echo "  -$SENDER_NAME- is not -$BUYER_NAME- "
+	echo "  The email doesn't not appear to be formatted as expected, perhaps paypal have changed the format"
+	exit -1
+fi
+if [ "$BUYER_EMAIL" != "$SENDER_EMAIL" ]
+then
+	echo "Email mismatch:"
+	echo "  -$BUYER_EMAIL- is not -$SENDER_EMAIL- "
+	echo "  The email doesn't not appear to be formatted as expected, perhaps paypal have changed the format"
+	exit -1
+fi
+
+if [ "$ITEM" == "Item no.v1.0" ]
+then
+	echo "Found requested stock item"
+	if [ "$UNIT_PRICE" != "\$0.99 USD" ]
+	then
+		echo "Price mismatch:"
+		echo "  -$UNIT_PRICE- != \$0.99 USD"
+		echo "  Prices changed, but this script not updated?"
+		echo "  Or potentially someone is trying to make a paypal payment with the correct details except for the price" 
+		exit -1
+	fi
+	# TODO: calculate that the total price is the correctly calculated product of the unit price by the quantitya
+else
+	exit -1
+fi
+
+echo "Generating license..."
+
+echo > $TEMPDIR/license.txt
+echo "PRODUCT=$DESC" >> $TEMPDIR/license.txt
+echo "COUNT=$QTY" >> $TEMPDIR/license.txt
+echo "ID=`uuidgen`" >> $TEMPDIR/license.txt
+echo "NAME=$BUYER_NAME" >> $TEMPDIR/license.txt
+echo "EMAIL=$BUYER_EMAIL" >> $TEMPDIR/license.txt
+echo "ADDRESS_LINE1=`echo $SHIPPING | cut -d '|' -f 2 | sed 's/[ \t]*\(.*\)/\1/'`" >> $TEMPDIR/license.txt
+echo "ADDRESS_LINE2=`echo $SHIPPING | cut -d '|' -f 3 | sed 's/[ \t]*\(.*\)/\1/'`" >> $TEMPDIR/license.txt
+echo "ADDRESS_LINE3=`echo $SHIPPING | cut -d '|' -f 4 | sed 's/[ \t]*\(.*\)/\1/'`" >> $TEMPDIR/license.txt
+echo "ADDRESS_LINE4=`echo $SHIPPING | cut -d '|' -f 5 | sed 's/[ \t]*\(.*\)/\1/'`" >> $TEMPDIR/license.txt
+echo "ADDRESS_LINE5=`echo $SHIPPING | cut -d '|' -f 6 | sed 's/[ \t]*\(.*\)/\1/'`" >> $TEMPDIR/license.txt
+
+# openssl genrsa -out $BILLING_PATH/private.pem 2048 > /dev/null
+# openssl rsa -in $BILLING_PATH/private.pem -outform PEM -pubout -out $BILLING_PATH/public.pem 
+
+cat $TEMPDIR/license.txt | openssl dgst -keyform pem -sha256 -sign $BILLING_PATH/private.pem > $TEMPDIR/sig.bin
+
+cat $TEMPDIR/license.txt | openssl dgst -keyform pem -sha256 -verify $BILLING_PATH/public.pem -signature $TEMPDIR/sig.bin
+
+SIG=`cat $TEMPDIR/sig.bin | base64 -w 50`
+
+echo "SIGNATURE_LINE1=`echo $SIG | tr ' ' '\n' | head -n 1 | tail -n 1`" >> $TEMPDIR/license.txt
+echo "SIGNATURE_LINE2=`echo $SIG | tr ' ' '\n' | head -n 2 | tail -n 1`" >> $TEMPDIR/license.txt
+echo "SIGNATURE_LINE3=`echo $SIG | tr ' ' '\n' | head -n 3 | tail -n 1`" >> $TEMPDIR/license.txt
+echo "SIGNATURE_LINE4=`echo $SIG | tr ' ' '\n' | head -n 4 | tail -n 1`" >> $TEMPDIR/license.txt
+echo "SIGNATURE_LINE5=`echo $SIG | tr ' ' '\n' | head -n 5 | tail -n 1`" >> $TEMPDIR/license.txt
+echo "SIGNATURE_LINE6=`echo $SIG | tr ' ' '\n' | head -n 6 | tail -n 1`" >> $TEMPDIR/license.txt
+echo "SIGNATURE_LINE7=`echo $SIG | tr ' ' '\n' | head -n 7 | tail -n 1`" >> $TEMPDIR/license.txt
+
+cat $TEMPDIR/license.txt
+
+# Cleanup temporary files
+if [ -d "$TEMPDIR" ]
+then
+	if [ `dirname $TEMPDIR` == "$HOME/tmp" ]
+	then
+		rm -rf $TEMPDIR
+	fi
+fi
+
+
diff --git a/Scripts/Billing/public.pem b/Scripts/Billing/public.pem
new file mode 100644
index 0000000..7bb12ca
--- /dev/null
+++ b/Scripts/Billing/public.pem
@@ -0,0 +1,9 @@
+-----BEGIN PUBLIC KEY-----
+MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA0H5OmJRvYhdQUFXyKoMg
+Is6EyigqzFHzjWfEb3rDSffhN5IgdELpVWl69g5aVPUHz9tm2SJbGaZ8WOO6qjrz
+sKLIFRgBM72UtZXPRTdAW6nyD9ni5kipLbFeB2R31zqKtPTTt8zbFGgJYpqcvb6v
+OpQzc3wlvea7VdiWht2RKihl31C8asm+fzAXAsQ5kDpq7FmXxiBsZnpsvJUTrPsE
+xmiNDpyfZPaAlKEkypiVui2B1SXAW41SgAXH3K42dnEedtxfNUZQu4mqoZnhzfE1
++Djj3EOnBWdy/UxGKzXxTMYinG/WbVkJe5QWF5GLov10dOqUM2tJn+CNcWJ4ogBw
+JQIDAQAB
+-----END PUBLIC KEY-----