diff --git a/modules/rfunds/mod.ts b/modules/rfunds/mod.ts
index 1490f38..c019857 100644
--- a/modules/rfunds/mod.ts
+++ b/modules/rfunds/mod.ts
@@ -183,9 +183,11 @@ routes.post("/api/transak/webhook", async (c) => {
 		return c.json({ error: "Invalid webhook data" }, 400);
 	}
 
-	// partnerOrderId format: "flowId" or "flowId:funnelId"
+	// partnerOrderId format: "flowId:funnelId" or "flowId" (uses env default)
 	const [flowId, funnelId] = partnerOrderId.split(":");
 	if (!flowId) return c.json({ error: "Missing flowId in partnerOrderId" }, 400);
+	const resolvedFunnelId = funnelId || process.env.FUNNEL_ID || "";
+	if (!resolvedFunnelId) return c.json({ error: "Missing funnelId" }, 400);
 
 	// Convert crypto amount to USDC units (6 decimals)
 	const amountUnits = Math.round(parseFloat(cryptoAmount) * 1e6).toString();
@@ -196,8 +198,8 @@ routes.post("/api/transak/webhook", async (c) => {
 		headers: { "Content-Type": "application/json" },
 		body: JSON.stringify({
 			amount: amountUnits,
-			source: "transak",
-			...(funnelId ? { funnelId } : {}),
+			source: "card",
+			funnelId: resolvedFunnelId,
 		}),
 	});