diff --git a/lostplaces/lostplaces_app/forms.py b/lostplaces/lostplaces_app/forms.py
index 0d404c6..5e79612 100644
--- a/lostplaces/lostplaces_app/forms.py
+++ b/lostplaces/lostplaces_app/forms.py
@@ -13,6 +13,17 @@ class ExplorerCreationForm(UserCreationForm):
         fields = ('username', 'email')
     voucher = forms.CharField(max_length=10)
 
+    def is_valid(self):
+        super().is_valid()
+        sumitted_voucher = self.cleaned_data.get('voucher')
+        try:
+            fetched_voucher = Voucher.objects.get(code=sumitted_voucher)
+        except Voucher.DoesNotExist:
+            return False
+
+        fetched_voucher.delete()
+        return True
+
 class ExplorerChangeForm(UserChangeForm):
     class Meta:
         model = Explorer