diff --git a/application/controllers/api/frontend/v1/coodle/CoodleSurvey.php b/application/controllers/api/frontend/v1/coodle/CoodleSurvey.php
index a88a75805..5ec1d76a0 100644
--- a/application/controllers/api/frontend/v1/coodle/CoodleSurvey.php
+++ b/application/controllers/api/frontend/v1/coodle/CoodleSurvey.php
@@ -265,7 +265,6 @@ class CoodleSurvey extends FHCAPI_Controller
 		}
 
 		$participants = $this->CoodleSurveyParticipantModel->getParticipants($surveyId);
-		$this->addMeta("particips", $participants);
 		$participantUids = array_map(
 			function ($participant) {
 				return $participant->uid;
@@ -292,8 +291,6 @@ class CoodleSurvey extends FHCAPI_Controller
 			);
 
 			$selection = array_slice($selection, 0, $survey->max_selections);
-			$this->addMeta("selection", $selection);
-			$this->addMeta("timeslotIds", $timeslotIds);
 		}
 
 		$this->CoodleSurveyParticipantModel->updateSelection($surveyId, getAuthUID(), json_encode($selection));
@@ -310,6 +307,8 @@ class CoodleSurvey extends FHCAPI_Controller
 			$this->terminateWithError("Survey not found!");
 		} else if ($survey->creator_uid !== getAuthUID()) {
 			$this->terminateWithError("You are not authorized to modify this survey!");
+		} else if ($survey->canceled_at) {
+			$this->terminateWithError("This survey has already been canceled!");
 		} else if ($survey->completed_at) {
 			$this->terminateWithError("This survey has already been completed!");
 		}
@@ -335,6 +334,8 @@ class CoodleSurvey extends FHCAPI_Controller
 			$this->terminateWithError("You are not authorized to modify this survey!");
 		} else if ($survey->canceled_at) {
 			$this->terminateWithError("This survey has already been canceled!");
+		} else if ($survey->completed_at) {
+			$this->terminateWithError("This survey has already been completed!");
 		}
 
 		if ($selectedTimeslotId) {
@@ -357,6 +358,35 @@ class CoodleSurvey extends FHCAPI_Controller
 		}
 	}
 
+	public function sendVotingReminders()
+	{
+		$surveyId = $this->input->post("surveyId");
+		$survey = $this->CoodleSurveyModel->getSurvey($surveyId);
+		if (!$survey) {
+			$this->terminateWithError("Survey not found!");
+		} else if ($survey->creator_uid !== getAuthUID()) {
+			$this->terminateWithError("You do not own this survey!");
+		} else if ($survey->canceled_at || $survey->completed_at) {
+			$this->terminateWithError("This survey is no longer active!");
+		}
+
+		$participants = $this->CoodleSurveyParticipantModel->getParticipants($surveyId);
+		$participantsWithoutVote = array_filter(
+			$participants,
+			function ($participant) {
+				return $participant->selection === null;
+			}
+		);
+
+		if (!count($participantsWithoutVote)) {
+			$this->terminateWithError("All participants have already voted!");
+		}
+
+		// todo: send reminder emails
+
+		$this->terminateWithSuccess();
+	}
+
 
 	// -----------------------------------------------------------------------------------------------------------------
 	// Private methods
diff --git a/public/js/api/factory/coodle.js b/public/js/api/factory/coodle.js
index ff4f2cf2c..8170f373a 100644
--- a/public/js/api/factory/coodle.js
+++ b/public/js/api/factory/coodle.js
@@ -98,4 +98,13 @@ export default {
 			},
 		};
 	},
+	sendReminders(surveyId) {
+		return {
+			method: "post",
+			url: "/api/frontend/v1/coodle/CoodleSurvey/sendVotingReminders",
+			params: {
+				surveyId,
+			},
+		};
+	}
 };
diff --git a/public/js/components/Cis/Coodle/Components/CoodleSurvey/CoodleSurveyHeader.js b/public/js/components/Cis/Coodle/Components/CoodleSurvey/CoodleSurveyHeader.js
index bef391e91..05161b670 100644
--- a/public/js/components/Cis/Coodle/Components/CoodleSurvey/CoodleSurveyHeader.js
+++ b/public/js/components/Cis/Coodle/Components/CoodleSurvey/CoodleSurveyHeader.js
@@ -41,7 +41,7 @@ export default {
 					this.$props.survey?.title,
 				);
 			const cancellationConfirmation = await this.$fhcAlert.confirm({
-				header: "Cancellation confirmation!",
+				header: "Cancellation confirmation",
 				message: cancellationConfirmationMessage,
 				acceptLabel: "Yes",
 				rejectLabel: "No",
@@ -66,6 +66,37 @@ export default {
 				this.$emit("surveyCanceled");
 			}
 		},
+		async sendReminders() {
+			if (!this.$props.survey?.id) return;
+
+			const numberOfParticipantsWithoutVote =
+				this.$props.survey.participants.filter(
+					(participant) => participant.selection === null,
+				).length;
+
+			if (!numberOfParticipantsWithoutVote) {
+				this.$fhcAlert.alertError(
+					"All participants have already voted!",
+				);
+				return;
+			}
+
+			const reminderConfirmation = await this.$fhcAlert.confirm({
+				header: "Reminder confirmation",
+				message:
+					"Are you sure you want to remind participants to vote?",
+				acceptLabel: "Yes",
+				rejectLabel: "No",
+			});
+			if (!reminderConfirmation) return;
+
+			const remindersResponse = this.$api.call(
+				CoodleApi.sendReminders(this.$props.survey.id),
+			);
+			if (remindersResponse.meta.status === "success") {
+				this.$fhcAlert.alertSuccess("Reminders successfully sent!");
+			}
+		},
 	},
 	template: /*html*/ `
 	<div class="d-flex flex-row align-items-center justify-content-between">
@@ -84,6 +115,15 @@ export default {
 				<i class="fa-solid fa-ellipsis-vertical fa-lg"></i>
 			</div>
 			<ul class="dropdown-menu dropdown-menu-end" style="min-width:0;'">
+				<li>
+					<div
+						@click="sendReminders()"
+						role="button"
+						class="dropdown-item px-3 py-1"
+					>
+						{{ "Send reminders" }}
+					</div>
+				</li>
 				<li>
 					<div
 						@click="$emit('editSurvey')"