diff --git a/EDPlayerJournal/BGS/Vouchers.cs b/EDPlayerJournal/BGS/Vouchers.cs
index a01501a..bc76c13 100644
--- a/EDPlayerJournal/BGS/Vouchers.cs
+++ b/EDPlayerJournal/BGS/Vouchers.cs
@@ -13,6 +13,16 @@ public class Vouchers : Transaction {
         Entries.Add(e);
     }
 
+    public override bool SystemContribution {
+        get {
+            if (Faction == Factions.PilotsFederation && Type == "Combat Bond") {
+                return true;
+            }
+
+            return false;
+        }
+    }
+
     public long TotalSum {
         get {
             if (Faction == null) {
@@ -39,9 +49,9 @@ public class Vouchers : Transaction {
                              .First();
                 if (v == null) {
                     return null;
-                } else if (v == "CombatBond") {
+                } else if (v == Bonds.CombatBond) {
                     type = "Combat Bond";
-                } else if (v == "bounty") {
+                } else if (v == Bonds.Bounty) {
                     type = "Bounty";
                 } else {
                     type = CultureInfo.CurrentCulture.TextInfo.ToTitleCase(v);
diff --git a/EDPlayerJournal/Bonds.cs b/EDPlayerJournal/Bonds.cs
new file mode 100644
index 0000000..22c4904
--- /dev/null
+++ b/EDPlayerJournal/Bonds.cs
@@ -0,0 +1,13 @@
+namespace EDPlayerJournal;
+
+public class Bonds {
+    /// <summary>
+    /// Internal string name for combat bonds.
+    /// </summary>
+    public static readonly string CombatBond = "CombatBond";
+
+    /// <summary>
+    /// Internal string name for bounties.
+    /// </summary>
+    public static readonly string Bounty = "bounty";
+}