diff --git a/src/main/java/seedu/address/logic/commands/AddPlanCommand.java b/src/main/java/seedu/address/logic/commands/AddPlanCommand.java
index 786bde42b0e..440791edd1a 100644
--- a/src/main/java/seedu/address/logic/commands/AddPlanCommand.java
+++ b/src/main/java/seedu/address/logic/commands/AddPlanCommand.java
@@ -87,9 +87,7 @@ public boolean equals(Object other) {
         }
 
         AddPlanCommand otherAddPlanCommand = (AddPlanCommand) other;
-        String thisPlan = planName.toString().toLowerCase();
-        String otherPlan = otherAddPlanCommand.planName.toString().toLowerCase();
-        return thisPlan.equals(otherPlan)
+        return planName.equals(otherAddPlanCommand.planName)
                 && planDateTime.equals(otherAddPlanCommand.planDateTime)
                 && friendName.equals(otherAddPlanCommand.friendName);
     }
diff --git a/src/main/java/seedu/address/model/plan/Plan.java b/src/main/java/seedu/address/model/plan/Plan.java
index 69563471a90..51cb9b3abd0 100644
--- a/src/main/java/seedu/address/model/plan/Plan.java
+++ b/src/main/java/seedu/address/model/plan/Plan.java
@@ -73,10 +73,8 @@ public boolean isSamePlan(Plan otherPlan) {
             return true;
         }
 
-        String thisPlanName = planName.toString().toLowerCase();
-
         return otherPlan != null
-                && thisPlanName.equals(otherPlan.planName.toString().toLowerCase())
+                && otherPlan.getPlanName().equals(getPlanName())
                 && otherPlan.getPlanFriend().equals(getPlanFriend())
                 && otherPlan.getPlanDateTime().equals(getPlanDateTime());
     }
@@ -107,9 +105,7 @@ public boolean equals(Object other) {
         }
 
         Plan otherPlan = (Plan) other;
-        String thisPlanName = planName.toString().toLowerCase();
-        String otherPlanName = otherPlan.planName.toString().toLowerCase();
-        return thisPlanName.equals(otherPlanName)
+        return planName.equals(otherPlan.planName)
                 && dateTime.equals(otherPlan.dateTime)
                 && friend.equals(otherPlan.friend);
     }
diff --git a/src/main/java/seedu/address/model/plan/PlanName.java b/src/main/java/seedu/address/model/plan/PlanName.java
index 809dc26c51d..a15a946a263 100644
--- a/src/main/java/seedu/address/model/plan/PlanName.java
+++ b/src/main/java/seedu/address/model/plan/PlanName.java
@@ -56,7 +56,7 @@ public boolean equals(Object other) {
         }
 
         seedu.address.model.plan.PlanName otherName = (seedu.address.model.plan.PlanName) other;
-        return planName.equals(otherName.planName);
+        return planName.equalsIgnoreCase(otherName.planName);
     }
 
     @Override