diff --git a/src/index.ts b/src/index.ts
index 4ebbf48..4423e56 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -118,10 +118,12 @@ const searchParams: {
     appointment: AppointmentType | null,
     kind: TestKind | null,
     dcc: boolean | null,
+    includeOutdated: boolean | null
 } = {
     appointment: null,
     kind: null,
-    dcc: null
+    dcc: null,
+    includeOutdated: false
 };
 
 (window as any).initMap = initMap;
@@ -198,6 +200,14 @@ function initializeFilterOptions() {
             searchByMapBounds(0);
         };
     }
+
+    const outdatedCheckbox = document.getElementById('includeOutdated-checkbox') as HTMLInputElement;
+    if (outdatedCheckbox != null) {
+        outdatedCheckbox.onclick = () => {
+            searchParams.includeOutdated = outdatedCheckbox.checked;
+            searchByMapBounds(0);
+        };
+    }
 }
 
 /**
@@ -277,6 +287,7 @@ function prepareSearchParams(params: { [id: string]: string | number | boolean |
     params['dcc'] = searchParams.dcc;
     params['kind'] = searchParams.kind;
     params['appointment'] = searchParams.appointment;
+    params['includeOutdated'] = searchParams.includeOutdated;
 
     return Object.keys(params)
         .filter(k => params[k] != null)
diff --git a/static/index.html b/static/index.html
index 9f0bd60..df9d828 100644
--- a/static/index.html
+++ b/static/index.html
@@ -7,7 +7,8 @@
     <meta http-equiv="X-UA-Compatible" content="ie=edge">
     <title>CWA - Schnellteststellensuche</title>
 
-    <link rel="apple-touch-icon" sizes="180x180" href="https://www.coronawarn.app/assets/img/icons/favicon-180x180.png">
+    <link rel="apple-touch-icon" sizes="180x180"
+          href="https://www.coronawarn.app/assets/img/icons/favicon-180x180.png">
     <link rel="icon" type="image/png" sizes="32x32"
           href="https://www.coronawarn.app/assets/img/icons/favicon-32x32.png">
     <link rel="icon" type="image/png" sizes="16x16"
@@ -29,12 +30,15 @@
     <div class="d-flex align-items-center justify-content-center">
         <a href="/">
             <div class="logo">
-                <img alt="Corona-Warn-App Logo" src="https://www.coronawarn.app/assets/img/icons/favicon-32x32.png">
+                <img alt="Corona-Warn-App Logo"
+                     src="https://www.coronawarn.app/assets/img/icons/favicon-32x32.png">
             </div>
         </a>
         <a href="/" title="Startseite">
-            <div class="title text-light cwa-heading">Corona-Warn-App - Schnellteststellensuche</div>
-            <div class="title text-light cwa-subheading">Für die Richtigkeit der Teststellendaten sind die Testanbieter
+            <div class="title text-light cwa-heading">Corona-Warn-App - Schnellteststellensuche
+            </div>
+            <div class="title text-light cwa-subheading">Für die Richtigkeit der Teststellendaten
+                sind die Testanbieter
                 verantwortlich
             </div>
         </a>
@@ -54,7 +58,8 @@
                             onclick="requestCurrentLocation()">
                         <i class="fas fa-map-marker-alt"></i>
                     </button>
-                    <input type="text" id="searchInput" class="form-control" placeholder="Postleitzahl"/>
+                    <input type="text" id="searchInput" class="form-control"
+                           placeholder="Postleitzahl"/>
                     <button
                             type="button" class="btn" title="Suchen" onclick="searchCenters()">
                         <i class="fas fa-search"></i>
@@ -73,10 +78,12 @@
                     <div class="filter-items d-flex flex-column flex-xl-row">
                         <div class="filter-item d-flex justify-content-between my-1 align-items-center">
                             <div class="searchLabel mx-1">
-                                <span class="text-dark"><i class="fas fa-calendar-alt fa-fw"></i></span>Termin:
+                                <span class="text-dark"><i
+                                        class="fas fa-calendar-alt fa-fw"></i></span>Termin:
                             </div>
                             <div class="dropdown searchDropdown terminDropdown">
-                                <button class="btn dropdown-toggle py-1" type="button" id="appointment-dropdown-button"
+                                <button class="btn dropdown-toggle py-1" type="button"
+                                        id="appointment-dropdown-button"
                                         data-bs-toggle="dropdown" aria-expanded="false">
                                     <!-- populated dynamically--></button>
                                 <ul id="appointment-dropdown" class="dropdown-menu"
@@ -89,10 +96,12 @@
 
                         <div class="filter-item d-flex justify-content-between my-1 align-items-center">
                             <div class="searchLabel mx-1">
-                                <span class="text-dark"><i class="fas fa-prescription-bottle-alt fa-fw"></i></span>Test-Art:
+                                <span class="text-dark"><i
+                                        class="fas fa-prescription-bottle-alt fa-fw"></i></span>Test-Art:
                             </div>
                             <div class="dropdown searchDropdown testArtDropdown">
-                                <button class="btn dropdown-toggle py-1" type="button" id="testKind-dropdown-button"
+                                <button class="btn dropdown-toggle py-1" type="button"
+                                        id="testKind-dropdown-button"
                                         data-bs-toggle="dropdown" aria-expanded="false">
                                     <!-- populated dynamically--> </button>
                                 <ul id="testKind-dropdown" class="dropdown-menu"
@@ -112,9 +121,22 @@
                                     Digital Covid Certificate:
                                 </label>
                             </div>
-                                <div class="form-check">
-                                    <input class="form-check-input" type="checkbox" value="" id="dcc-checkbox"/>
-                                </div>
+                            <div class="form-check">
+                                <input class="form-check-input" type="checkbox" value=""
+                                       id="dcc-checkbox"/>
+                            </div>
+                        </div>
+
+                        <div class="filter-item d-flex justify-content-between my-1 align-items-center">
+                            <div class="searchLabel d-flex align-items-center">
+                                <label class="form-check-label mx-1" for="includeOutdated-checkbox">
+                                    Auch veraltete anzeigen:
+                                </label>
+                            </div>
+                            <div class="form-check">
+                                <input class="form-check-input" type="checkbox" value=""
+                                       id="includeOutdated-checkbox"/>
+                            </div>
                         </div>
 
                     </div>
@@ -160,7 +182,8 @@ <h3 id="name" class="center-name flex-grow-1 px-1">Muster</h3>
                 <img id="dccLogo"
                      title="Digital Covid Pass verfügbar" class="dccLogo me-1" src="/img/dcc.png"
                      alt="Digital Covid Pass verfügbar"/>
-                <i class="far fa-window-close close-button align-self-baseline me-1" onclick="clearSelection()"></i>
+                <i class="far fa-window-close close-button align-self-baseline me-1"
+                   onclick="clearSelection()"></i>
             </div>
         </div>
         <div class="card-body pt-1">
@@ -190,7 +213,8 @@ <h3 id="name" class="center-name flex-grow-1 px-1">Muster</h3>
                 <div class="d-flex flex-row mt-1">
                     <span class="text-dark"><i class="fas fa-clock"></i></span>
                     <p class="card-text ms-2">
-                        <a id="openinghours-button" href="#openinghours-panel" data-bs-toggle="collapse"
+                        <a id="openinghours-button" href="#openinghours-panel"
+                           data-bs-toggle="collapse"
                            class="text-main collapse-button link">
                             Öffnungszeiten</a>
                         <span id="no-openinghours">Keine Öffnungszeiten angegeben</span>
@@ -198,7 +222,8 @@ <h3 id="name" class="center-name flex-grow-1 px-1">Muster</h3>
                 </div>
                 <div id="openinghours-panel" class="collapse">
                     <!-- List with details about time -->
-                    <div class="card card-body" style="background-color: transparent;padding: 0.5rem">
+                    <div class="card card-body"
+                         style="background-color: transparent;padding: 0.5rem">
                         <ul id="openinghours-list" style="margin-bottom: 0.5rem">
                         </ul>
                     </div>
@@ -257,9 +282,15 @@ <h3 id="name" class="center-name flex-grow-1 px-1">Muster</h3>
                             <option value="Öffnungszeiten falsch">Öffnungszeiten falsch</option>
                             <option value="Teststelle geschlossen">Teststelle geschlossen</option>
                             <option value="Falsche Angaben">Falsche Angaben</option>
-                            <option value="Testergebnis kommt nicht an">Testergebnis kommt nicht an</option>
-                            <option value="Testzertifikat kommt nicht an">Testzertifikat kommt nicht an</option>
-                            <option value="Angaben zu Testmöglichkeiten fehlerhaft">Angaben zu Testmöglichkeiten fehlerhaft</option>
+                            <option value="Testergebnis kommt nicht an">Testergebnis kommt nicht
+                                an
+                            </option>
+                            <option value="Testzertifikat kommt nicht an">Testzertifikat kommt nicht
+                                an
+                            </option>
+                            <option value="Angaben zu Testmöglichkeiten fehlerhaft">Angaben zu
+                                Testmöglichkeiten fehlerhaft
+                            </option>
                             <option value="Sonstiges">Sonstiges</option>
                         </select>
                     </div>
@@ -273,7 +304,8 @@ <h3 id="name" class="center-name flex-grow-1 px-1">Muster</h3>
                         <a id="submitReport" class="btn btn-sm btn-secondary" target="_blank"
                            onclick="submitReport();"><i class="fas fa-save"></i> Abschicken</a>
                         <a id="closeReport" class="btn btn-sm btn-secondary" target="_blank"
-                           onclick="toggleReportPanel(true);"><i class="fas fa-window-close"></i> Abbrechen</a>
+                           onclick="toggleReportPanel(true);"><i class="fas fa-window-close"></i>
+                            Abbrechen</a>
                     </div>
                 </div>
             </div>