diff --git a/gts/pokemondpds.ashx.cs b/gts/pokemondpds.ashx.cs
index 54485a44..a3380bd4 100644
--- a/gts/pokemondpds.ashx.cs
+++ b/gts/pokemondpds.ashx.cs
@@ -377,7 +377,7 @@ namespace PkmnFoundations.GTS
                         int targetPid = BitConverter.ToInt32(data, 296);
                         GtsRecord4 result = DataAbstract.Instance.GtsDataForUser4(targetPid);
 
-                        if (result == null)
+                        if (result == null || result.IsExchanged != 0)
                         {
                             // Pokémon is traded (or was never here to begin with)
                             // todo: I only checked this on GenV. Check that this
diff --git a/gts/syachi2ds.ashx.cs b/gts/syachi2ds.ashx.cs
index adc96c84..ed4bc54e 100644
--- a/gts/syachi2ds.ashx.cs
+++ b/gts/syachi2ds.ashx.cs
@@ -386,7 +386,7 @@ namespace PkmnFoundations.GTS
                             int targetPid = BitConverter.ToInt32(data, 304);
                             GtsRecord5 result = DataAbstract.Instance.GtsDataForUser5(targetPid);
 
-                            if (result == null)
+                            if (result == null || result.IsExchanged != 0)
                             {
                                 // Pokémon is traded (or was never here to begin with)
                                 manager.Remove(session);
diff --git a/library/Structures/GtsRecord4.cs b/library/Structures/GtsRecord4.cs
index a64ece06..5b03dbb2 100644
--- a/library/Structures/GtsRecord4.cs
+++ b/library/Structures/GtsRecord4.cs
@@ -159,6 +159,8 @@ namespace PkmnFoundations.Structures
 
         public bool CanTrade(GtsRecord4 other)
         {
+            if (IsExchanged != 0 || other.IsExchanged != 0) return false;
+
             if (Species != other.RequestedSpecies) return false;
             if (other.RequestedGender != Genders.Either && Gender != other.RequestedGender) return false;
             if (!CheckLevels(other.RequestedMinLevel, other.RequestedMaxLevel, Level)) return false;
diff --git a/library/Structures/GtsRecord5.cs b/library/Structures/GtsRecord5.cs
index 5022b31d..6167330b 100644
--- a/library/Structures/GtsRecord5.cs
+++ b/library/Structures/GtsRecord5.cs
@@ -173,6 +173,8 @@ namespace PkmnFoundations.Structures
 
         public bool CanTrade(GtsRecord5 other)
         {
+            if (IsExchanged != 0 || other.IsExchanged != 0) return false;
+
             if (Species != other.RequestedSpecies) return false;
             if (other.RequestedGender != Genders.Either && Gender != other.RequestedGender) return false;
             if (!CheckLevels(other.RequestedMinLevel, other.RequestedMaxLevel, Level)) return false;