diff --git a/echo/frontend/src/components/participant/ParticipantInitiateForm.tsx b/echo/frontend/src/components/participant/ParticipantInitiateForm.tsx
index ba754e96..5f12ecff 100644
--- a/echo/frontend/src/components/participant/ParticipantInitiateForm.tsx
+++ b/echo/frontend/src/components/participant/ParticipantInitiateForm.tsx
@@ -36,11 +36,13 @@ export const ParticipantInitiateForm = ({ project }: { project: Project }) => {
 	const [readyValues, setReadyValues] = useState<FormValues | null>(null);
 
 	const defaultName =
-		searchParams.get("participant_name") || searchParams.get("name") || "";
+		searchParams.get("participant_name") ||
+		searchParams.get("title") ||
+		"";
 	const defaultEmail =
-		searchParams.get("participant_email") || searchParams.get("email") || "";
+		searchParams.get("participant_email") || "";
 	const defaultTagsParam =
-		searchParams.get("tags") || searchParams.get("tag_id_list") || "";
+		searchParams.get("tags") || "";
 
 	const defaultTagIdList = useMemo(() => {
 		if (!defaultTagsParam) return [];
diff --git a/echo/frontend/src/components/participant/ParticipantOnboardingCards.tsx b/echo/frontend/src/components/participant/ParticipantOnboardingCards.tsx
index 44846597..223e3ab3 100644
--- a/echo/frontend/src/components/participant/ParticipantOnboardingCards.tsx
+++ b/echo/frontend/src/components/participant/ParticipantOnboardingCards.tsx
@@ -70,10 +70,10 @@ const ParticipantOnboardingCards = ({
 
 	const { language } = useLanguage();
 
-	// Tables/tags preselected via the QR URL (?tags= / ?tag_id_list=), resolved
+	// Tables/tags preselected via the QR URL (?tags=), resolved
 	// to labels so the funnel can show them and mark them as preselected.
 	const preselectedTags = useMemo(() => {
-		const raw = searchParams.get("tags") ?? searchParams.get("tag_id_list");
+		const raw = searchParams.get("tags");
 		if (!raw) return [] as string[];
 		const wanted = raw
 			.split(",")