diff --git a/compensation/forms.py b/compensation/forms.py
index 33c9e946..7dfb8226 100644
--- a/compensation/forms.py
+++ b/compensation/forms.py
@@ -5,11 +5,12 @@ Contact: michel.peltriaux@sgdnord.rlp.de
 Created on: 04.12.20
 
 """
+from bootstrap_modal_forms.utils import is_ajax
 from django import forms
 from django.contrib import messages
 from django.db import transaction
-from django.http import HttpRequest
-from django.shortcuts import redirect, render
+from django.http import HttpRequest, HttpResponseRedirect
+from django.shortcuts import render
 from django.utils.translation import gettext_lazy as _
 
 from compensation.models import Payment, CompensationState, CompensationAction, UnitChoices
@@ -153,19 +154,24 @@ class NewStateModalForm(BaseModalForm):
         template = self.template
         if request.method == "POST":
             if self.is_valid():
-                is_before_state = bool(request.GET.get("before", False))
-                self.save(is_before_state=is_before_state)
-                messages.success(
-                    request,
-                    msg_success
-                )
-                return redirect(redirect_url)
+                # Modal forms send one POST for checking on data validity. This can be used to return possible errors
+                # on the form. A second POST (if no errors occured) is sent afterwards and needs to process the
+                # saving/commiting of the data to the database. is_ajax() performs this check. The first request is
+                # an ajax call, the second is a regular form POST.
+                if not is_ajax(request.META):
+                    is_before_state = bool(request.GET.get("before", False))
+                    self.save(is_before_state=is_before_state)
+                    messages.success(
+                        request,
+                        msg_success
+                    )
+                return HttpResponseRedirect(redirect_url)
             else:
-                messages.info(
-                    request,
-                    msg_error
-                )
-                return redirect(redirect_url)
+                context = {
+                    "form": self,
+                }
+                context = BaseContext(request, context).context
+                return render(request, template, context)
         elif request.method == "GET":
             context = {
                 "form": self,
diff --git a/konova/forms.py b/konova/forms.py
index d685292e..f07a08a5 100644
--- a/konova/forms.py
+++ b/konova/forms.py
@@ -173,6 +173,10 @@ class BaseModalForm(BaseForm, BSModalForm):
         if request.method == "POST":
             if self.is_valid():
                 if not is_ajax(request.META):
+                    # Modal forms send one POST for checking on data validity. This can be used to return possible errors
+                    # on the form. A second POST (if no errors occured) is sent afterwards and needs to process the
+                    # saving/commiting of the data to the database. is_ajax() performs this check. The first request is
+                    # an ajax call, the second is a regular form POST.
                     self.save()
                     messages.success(
                         request,
diff --git a/locale/de/LC_MESSAGES/django.mo b/locale/de/LC_MESSAGES/django.mo
index 42f068a2..5de77a79 100644
Binary files a/locale/de/LC_MESSAGES/django.mo and b/locale/de/LC_MESSAGES/django.mo differ
diff --git a/locale/de/LC_MESSAGES/django.po b/locale/de/LC_MESSAGES/django.po
index 77477acc..7c52cdef 100644
--- a/locale/de/LC_MESSAGES/django.po
+++ b/locale/de/LC_MESSAGES/django.po
@@ -410,7 +410,7 @@ msgstr "Termine und Fristen"
 #: compensation/templates/compensation/detail/compensation/includes/deadlines.html:14
 #: compensation/templates/compensation/detail/eco_account/includes/deadlines.html:14
 msgid "Add new deadline"
-msgstr "Neue Frist hinzufügen"
+msgstr "Frist/Termin hinzufügen"
 
 #: compensation/templates/compensation/detail/compensation/includes/deadlines.html:28
 #: compensation/templates/compensation/detail/eco_account/includes/deadlines.html:28
@@ -594,7 +594,7 @@ msgstr "Maßnahme hinzugefügt"
 #: compensation/views/compensation_views.py:219
 #: compensation/views/eco_account_views.py:265
 msgid "Deadline added"
-msgstr "Frist hinzugefügt"
+msgstr "Frist/Termin hinzugefügt"
 
 #: compensation/views/compensation_views.py:238
 msgid "State removed"