diff --git a/src/api/client.ts b/src/api/client.ts
index 89ca835..3d74d59 100644
--- a/src/api/client.ts
+++ b/src/api/client.ts
@@ -42,8 +42,8 @@ export const startBuyFlow = (quantity: number) =>
     AxiosResponse<{ url: string }, unknown, {}>
   >;
 
-export const completeBuyFlow = () =>
-  axios.post("/buy/complete", {}, getJwtHeader()) as Promise<
+export const completeBuyFlow = (purchaseId: string) =>
+  axios.post("/buy/complete", { purchaseId }, getJwtHeader()) as Promise<
     AxiosResponse<{ url: string }, unknown, {}>
   >;
 
diff --git a/src/pages/buy/Buy.tsx b/src/pages/buy/Buy.tsx
index 21194be..b8d9488 100644
--- a/src/pages/buy/Buy.tsx
+++ b/src/pages/buy/Buy.tsx
@@ -47,7 +47,7 @@ export const Buy = () => {
           <FormControlLabel
             value="10"
             control={<Radio />}
-            label="10 tokens - 40"
+            label="10 tokens - 40€"
           />
         </RadioGroup>
       </Paper>
diff --git a/src/pages/buy/BuyReturn.tsx b/src/pages/buy/BuyReturn.tsx
index 1e28b9d..f5afc5f 100644
--- a/src/pages/buy/BuyReturn.tsx
+++ b/src/pages/buy/BuyReturn.tsx
@@ -2,7 +2,10 @@ import { completeBuyFlow } from "../../api/client";
 import { CircularProgress, Grid, Typography } from "@mui/material";
 
 export const BuyReturn = () => {
-  completeBuyFlow().then(
+  const purchaseId = new URL(window.location.href).searchParams.get(
+    "purchaseId",
+  )!;
+  completeBuyFlow(purchaseId).then(
     (response) => (window.location.href = response.data.url),
   );