diff --git a/C4/SIP/ILS/Patron.pm b/C4/SIP/ILS/Patron.pm
index 99546da569..b528501f39 100644
--- a/C4/SIP/ILS/Patron.pm
+++ b/C4/SIP/ILS/Patron.pm
@@ -15,7 +15,7 @@ use Carp;
 use Sys::Syslog qw(syslog);
 use Data::Dumper;
 
-use C4::SIP::Sip qw(add_field);
+use C4::SIP::Sip qw(add_field maybe_add);
 
 use C4::Debug;
 use C4::Context;
@@ -216,7 +216,14 @@ sub AUTOLOAD {
     }
 }
 
-sub name {
+=head2 format
+
+This method uses a template to build a string from a Koha::Patron object
+If errors are encountered in processing template we log them and return nothing
+
+=cut
+
+sub format {
     my ( $self, $template ) = @_;
 
     if ($template) {
@@ -228,12 +235,15 @@ sub name {
         my $patron = Koha::Patrons->find( $self->{borrowernumber} );
 
         my $output;
-        $tt->process( \$template, { patron => $patron }, \$output );
+        eval {
+            $tt->process( \$template, { patron => $patron }, \$output );
+        };
+        if ( $@ ){
+            syslog("LOG_DEBUG", "Error processing template: $template");
+            return "";
+        }
         return $output;
     }
-    else {
-        return $self->{name};
-    }
 }
 
 sub check_password {
@@ -528,7 +538,6 @@ sub build_patron_attributes_string {
     my ( $self, $server ) = @_;
 
     my $string = q{};
-
     if ( $server->{account}->{patron_attribute} ) {
         my @attributes_to_send =
           ref $server->{account}->{patron_attribute} eq "ARRAY"
@@ -553,6 +562,30 @@ sub build_patron_attributes_string {
     return $string;
 }
 
+
+=head2 build_custom_field_string
+
+This method builds the part of the sip message for custom patron fields as defined in the sip config
+
+=cut
+
+sub build_custom_field_string {
+    my ( $self, $server ) = @_;
+
+    my $string = q{};
+
+    if ( $server->{account}->{custom_patron_field} ) {
+        my @custom_fields =
+            ref $server->{account}->{custom_patron_field} eq "ARRAY"
+            ? @{ $server->{account}->{custom_patron_field} }
+            : $server->{account}->{custom_patron_field};
+        foreach my $custom_field ( @custom_fields ) {
+            $string .= maybe_add( $custom_field->{field}, $self->format( $custom_field->{template} ) ) if defined $custom_field->{field};
+        }
+    }
+    return $string;
+}
+
 1;
 __END__
 
diff --git a/C4/SIP/Sip.pm b/C4/SIP/Sip.pm
index a708fa148a..2dc4749214 100644
--- a/C4/SIP/Sip.pm
+++ b/C4/SIP/Sip.pm
@@ -108,7 +108,6 @@ sub maybe_add {
             $value =~ s/$regex->{find}/$regex->{replace}/g;
         }
     }
-
     return (defined($value) && $value) ? add_field($fid, $value) : '';
 }
 
diff --git a/C4/SIP/Sip/MsgType.pm b/C4/SIP/Sip/MsgType.pm
index 3a3ea840a4..3184ebba96 100644
--- a/C4/SIP/Sip/MsgType.pm
+++ b/C4/SIP/Sip/MsgType.pm
@@ -436,7 +436,12 @@ sub build_patron_status {
 
         $resp .= patron_status_string($patron);
         $resp .= $lang . timestamp();
-        $resp .= add_field( FID_PERSONAL_NAME, $patron->name( $server->{account}->{ae_field_template} ), $server );
+        if ( defined $server->{account}->{ae_field_template} ) {
+            $resp .= add_field( FID_PERSONAL_NAME, $patron->format( $server->{account}->{ae_field_template}, $server ) );
+        } else {
+            $resp .= add_field( FID_PERSONAL_NAME, $patron->name, $server );
+        }
+
 
         # while the patron ID we got from the SC is valid, let's
         # use the one returned from the ILS, just in case...
@@ -459,6 +464,7 @@ sub build_patron_status {
           if ( $server->{account}->{send_patron_home_library_in_af} );
         $resp .= maybe_add( FID_PRINT_LINE, $patron->print_line, $server );
 
+        $resp .= $patron->build_custom_field_string( $server );
         $resp .= $patron->build_patron_attributes_string( $server );
 
     } else {
@@ -972,7 +978,11 @@ sub handle_patron_info {
         # while the patron ID we got from the SC is valid, let's
         # use the one returned from the ILS, just in case...
         $resp .= add_field( FID_PATRON_ID,     $patron->id, $server );
-        $resp .= add_field( FID_PERSONAL_NAME, $patron->name( $server->{account}->{ae_field_template} ), $server );
+        if ( defined $server->{account}->{ae_field_template} ) {
+            $resp .= add_field( FID_PERSONAL_NAME, $patron->format( $server->{account}->{ae_field_template} ), $server );
+        } else {
+            $resp .= add_field( FID_PERSONAL_NAME, $patron->name, $server );
+        }
 
         # TODO: add code for the fields
         #   hold items limit
@@ -1027,6 +1037,7 @@ sub handle_patron_info {
         }
         $resp .= maybe_add( FID_PRINT_LINE, $patron->print_line, $server );
 
+        $resp .= $patron->build_custom_field_string( $server );
         $resp .= $patron->build_patron_attributes_string( $server );
     } else {
 
@@ -1315,7 +1326,7 @@ sub handle_patron_enable {
         $resp .= $patron->language . timestamp();
 
         $resp .= add_field( FID_PATRON_ID,     $patron->id, $server );
-        $resp .= add_field( FID_PERSONAL_NAME, $patron->name( $server->{account}->{ae_field_template} ), $server );
+        $resp .= add_field( FID_PERSONAL_NAME, $patron->format( $server->{account}->{ae_field_template} ), $server );
         if ( defined($patron_pwd) ) {
             $resp .= add_field( FID_VALID_PATRON_PWD, sipbool( $patron->check_password($patron_pwd) ), $server );
         }
diff --git a/etc/SIPconfig.xml b/etc/SIPconfig.xml
index f1c516f8f2..43f53e2160 100644
--- a/etc/SIPconfig.xml
+++ b/etc/SIPconfig.xml
@@ -66,6 +66,7 @@
           <syspref_overrides>
               <AllFinesNeedOverride>0</AllFinesNeedOverride>
           </syspref_overrides>
+          <custom_patron_field field="DE" template="[% patron.dateexpiry %]" />
       </login>
   </accounts>
 
diff --git a/t/db_dependent/SIP/Patron.t b/t/db_dependent/SIP/Patron.t
index 0f20ac3e5c..d517c7693b 100755
--- a/t/db_dependent/SIP/Patron.t
+++ b/t/db_dependent/SIP/Patron.t
@@ -4,7 +4,7 @@
 # This needs to be extended! Your help is appreciated..
 
 use Modern::Perl;
-use Test::More tests => 5;
+use Test::More tests => 6;
 
 use Koha::Database;
 use Koha::Patrons;
@@ -116,6 +116,50 @@ subtest "Test build_patron_attribute_string" => sub {
     is( $attribute_string, "XYTest Attribute|YZAnother Test Attribute|", 'Attribute field generated correctly with multiple params' );
 };
 
+subtest "Test build_custom_field_string" => sub {
+
+    plan tests => 5;
+
+    my $patron = $builder->build_object( { class => 'Koha::Patrons',value=>{surname => "Duck", firstname => "Darkwing"} } );
+
+
+    my $ils_patron = C4::SIP::ILS::Patron->new( $patron->cardnumber );
+
+    my $server = {};
+    $server->{account}->{custom_patron_field}->{field} = "DW";
+    my $attribute_string = $ils_patron->build_custom_field_string( $server );
+    is( $attribute_string, "", 'Custom field not generated if no value passed' );
+
+    $server = {};
+    $server->{account}->{custom_patron_field}->{template} = "[% patron.surname %]";
+    $attribute_string = $ils_patron->build_custom_field_string( $server );
+    is( $attribute_string, "", 'Custom field not generated if no field passed' );
+
+
+    $server = {};
+    $server->{account}->{custom_patron_field}->{field} = "DW";
+    $server->{account}->{custom_patron_field}->{template} = "[% patron.firstname %] [% patron.surname %], let's get dangerous!";
+    $attribute_string = $ils_patron->build_custom_field_string( $server );
+    is( $attribute_string, "DWDarkwing Duck, let's get dangerous!|", 'Custom field processed correctly' );
+
+    $server = {};
+    $server->{account}->{custom_patron_field}->[0]->{field} = "DW";
+    $server->{account}->{custom_patron_field}->[0]->{template} = "[% patron.firstname %] [% patron.surname %], let's get dangerous!";
+    $server->{account}->{custom_patron_field}->[1]->{field} = "LM";
+    $server->{account}->{custom_patron_field}->[1]->{template} = "Launchpad McQuack crashed on [% patron.dateexpiry %]";
+    $attribute_string = $ils_patron->build_custom_field_string( $server );
+    is( $attribute_string, "DWDarkwing Duck, let's get dangerous!|LMLaunchpad McQuack crashed on ".$patron->dateexpiry."|", 'Custom fields processed correctly when multiple exist' );
+
+    $server = {};
+    $server->{account}->{custom_patron_field}->[0]->{field} = "DW";
+    $server->{account}->{custom_patron_field}->[0]->{template} = "[% IF (patron.firstname) %] patron.surname, let's get dangerous!";
+    $server->{account}->{custom_patron_field}->[1]->{field} = "LM";
+    $server->{account}->{custom_patron_field}->[1]->{template} = "Launchpad McQuack crashed on [% patron.dateexpiry %]";
+    $attribute_string = $ils_patron->build_custom_field_string( $server );
+    is( $attribute_string, "LMLaunchpad McQuack crashed on ".$patron->dateexpiry."|", 'Custom fields processed correctly, bad template generate no text' );
+
+};
+
 subtest "update_lastseen tests" => sub {
     plan tests => 2;