diff --git a/source/api/actions/group_list.ts b/source/api/actions/group_list.ts
index bcccbaf..c8d4cf2 100644
--- a/source/api/actions/group_list.ts
+++ b/source/api/actions/group_list.ts
@@ -68,7 +68,7 @@ namespace _espe.api
 						"name",
 					]
 				}),
-				"restriction": () => restriction_logged_in,
+				"restriction": () => restriction_none,
 				"execution": () => async ({}) => {
 					const data = await _espe.service.group.list();
 					return Promise.resolve({
diff --git a/source/conf.ts b/source/conf.ts
index b64301a..39d9d92 100644
--- a/source/conf.ts
+++ b/source/conf.ts
@@ -412,8 +412,8 @@ namespace _espe.conf
 								: 240
 							),
 							"must_contain_letter": (node_settings_password_policy["must_contain_letter"] ?? true),
-							"must_contain_number": (node_settings_password_policy["must_contain_number"] ?? true),
-							"must_contain_special_character": (node_settings_password_policy["must_contain_special_character"] ?? true),
+							"must_contain_number": (node_settings_password_policy["must_contain_number"] ?? false),
+							"must_contain_special_character": (node_settings_password_policy["must_contain_special_character"] ?? false),
 						})) (node_settings["password_policy"] ?? {})
 					),
 					"password_change": (
diff --git a/source/data/localization/deu.loc.json b/source/data/localization/deu.loc.json
index 8b5a524..d86a9e3 100644
--- a/source/data/localization/deu.loc.json
+++ b/source/data/localization/deu.loc.json
@@ -3,8 +3,6 @@
 		"identifier": "deu"
 	},
 	"tree": {
-		"email.summon.subject": "Registrierung",
-		"email.summon.body": "Hi, {{name}}\n\n{{remark}}\n\nWenn du die Dienste nutzen möchtest, rufe bitte folgende Adresse auf:\n\n{{url}}",
 		"email.registration.subject": "Registrierung erfolgt",
 		"email.registration.body": "Das Mitglied '{{name_display}}' hat sich soeben registriert:\n\n{{url}}",
 		"email.activation.subject": "Freischaltung erfolgt",
@@ -15,7 +13,7 @@
 		"email.password_change.execution.subject": "Passwort-Änderung abgeschlossen",
 		"email.password_change.execution.body": "Hi, {{name}}\n\nDein Passwort wurde soeben geändert.\n",
 		"email.invitation.subject": "Einladung",
-		"email.invitation.body": "{{url}}",
+		"email.invitation.body": "Du wurdest zu {{organisation}} eingeladen. Um beizutreten, rufe bitte folgende Adresse auf:\n\n{{url}}",
 		"help.args.action.description": "auszuführende Aktion; Auswahl",
 		"help.args.action.options.serve": "Server starten",
 		"help.args.action.options.api_doc": "API-Dokumentation gemäß OpenAPI-Spezifikation auf Standard-Ausgabe schreiben",
diff --git a/source/data/localization/eng.loc.json b/source/data/localization/eng.loc.json
index 0450b8b..8d8875b 100644
--- a/source/data/localization/eng.loc.json
+++ b/source/data/localization/eng.loc.json
@@ -3,8 +3,6 @@
 		"identifier": "eng"
 	},
 	"tree": {
-		"email.summon.subject": "Registration",
-		"email.summon.body": "Hi, {{name}}\n\n{{remark}}\n\nIn case you want to use online service, open the following link:\n\n{{url}}",
 		"email.registration.subject": "Registration received",
 		"email.registration.body": "The member '{{name_display}}' just registered:\n\n{{url}}",
 		"email.activation.subject": "Activated",
@@ -15,7 +13,7 @@
 		"email.password_change.execution.subject": "Password change concluded",
 		"email.password_change.execution.body": "Hi, {{name}}\n\nYour password has just been changed.\n",
 		"email.invitation.subject": "invitation",
-		"email.invitation.body": "{{url}}",
+		"email.invitation.body": "You have been invited to {{organisation}}. In order to join, please open the following address:\n\n{{url}}",
 		"help.args.action.description": "action to executo; options",
 		"help.args.action.options.serve": "start server",
 		"help.args.action.options.api_doc": "write API documentation according to OpenAPI specification to stdout",
diff --git a/source/services/invitation.ts b/source/services/invitation.ts
index 5a5d513..1e526b3 100644
--- a/source/services/invitation.ts
+++ b/source/services/invitation.ts
@@ -68,9 +68,9 @@ namespace _espe.service.invitation
 			"groups_value": groups_value,
 		} : {
 			name_changeable : boolean;
-			name_value : string;
+			name_value : (null | string);
 			label_changeable : boolean;
-			label_value : string;
+			label_value : (null | string);
 			email_address_changeable : boolean;
 			email_address_value : (null | string);
 			groups_changeable : boolean;
@@ -86,7 +86,12 @@ namespace _espe.service.invitation
 			send_immediatly ?: boolean;
 		} = {
 		}
-	) : Promise<{id : _espe.type.invitation_id; key : _espe.type.invitation_key}>
+	) : Promise<
+		{
+			id : _espe.type.invitation_id;
+			key : _espe.type.invitation_key;
+		}
+	>
 	{
 		/**
 		 * @todo outsource to conf
@@ -97,7 +102,7 @@ namespace _espe.service.invitation
 		 */
 		const invitation_key : _espe.type.invitation_key = lib_plankton.sha256.get(
 			(
-				name_value
+				(name_value ?? "")
 				+
 				"/"
 				+
@@ -162,18 +167,22 @@ namespace _espe.service.invitation
 							"key": invitation_key,
 						}
 					);
-					try {
+					try
+					{
 						await _espe.helpers.email_send(
 							[email_address_value],
-							lib_plankton.translate.get(
-								"email.invitation.subject",
+							lib_plankton.string.coin(
+								"{{head}} | {{core}}",
 								{
+									"head": _espe.conf.get().settings.organisation.name,
+									"core": lib_plankton.translate.get("email.invitation.subject"),
 								}
 							),
 							lib_plankton.translate.get(
 								"email.invitation.body",
 								{
 									"url": (url ?? "?"),
+									"organisation": _espe.conf.get().settings.organisation.name,
 								}
 							),
 						);
diff --git a/source/services/member.ts b/source/services/member.ts
index da5cc35..445313d 100644
--- a/source/services/member.ts
+++ b/source/services/member.ts
@@ -343,62 +343,6 @@ namespace _espe.service.member
 	}
 	
 	
-	/**
-	 * sendet an ein Mitglied eine E-Mail mit Aufforderung zur Registrierung
-	 */
-	export async function summon(
-		member_id : _espe.type.member_id,
-		url_template : string
-	) : Promise<(null | string)>
-	{
-		_espe.helpers.frontend_url_check();
-		const member_object : _espe.type.member_object = await get(member_id);
-		if (member_object.email_address === null)
-		{
-			return null;
-		}
-		else
-		{
-			const url : (null | string) = _espe.helpers.frontend_url_get(
-				url_template,
-				{
-					"verification": await _espe.helpers.verification_get(member_id),
-				}
-			);
-			if (url === null) {
-				// do nothing
-			}
-			else {
-				await _espe.helpers.email_send(
-					[
-						member_object.email_address,
-					],
-					lib_plankton.string.coin(
-						"{{head}} | {{core}}",
-						{
-							"head": _espe.conf.get().settings.organisation.name,
-							"core": lib_plankton.translate.get("email.summon.subject"),
-						}
-					),
-					lib_plankton.string.coin(
-						lib_plankton.translate.get("email.summon.body"),
-						{
-							"name": name_display(member_object),
-							"url": url,
-							"remark": (
-								(_espe.conf.get().settings.summon_email.remark === null)
-								? ""
-								: (_espe.conf.get().settings.summon_email.remark + "\n\n")
-							),
-						}
-					)
-				);
-			}
-			return url;
-		}
-	}
-	
-	
 	/**
 	 * ändert bestimmte Daten des Mitglied
 	 */