diff --git a/apps/scandic-web/components/HotelReservation/MyStay/ReferenceCard/Actions/NotCancelled/ManageStay/Actions/CancelStay/Steps/FinalConfirmation/index.tsx b/apps/scandic-web/components/HotelReservation/MyStay/ReferenceCard/Actions/NotCancelled/ManageStay/Actions/CancelStay/Steps/FinalConfirmation/index.tsx
index 3c5cbca8c..8bd45aadf 100644
--- a/apps/scandic-web/components/HotelReservation/MyStay/ReferenceCard/Actions/NotCancelled/ManageStay/Actions/CancelStay/Steps/FinalConfirmation/index.tsx
+++ b/apps/scandic-web/components/HotelReservation/MyStay/ReferenceCard/Actions/NotCancelled/ManageStay/Actions/CancelStay/Steps/FinalConfirmation/index.tsx
@@ -40,7 +40,7 @@ export default function FinalConfirmation({
     defaultMessage: "We’re sorry that things didn’t work out.",
   })
 
-  const cancelBookingsMutation = trpc.booking.cancelMany.useMutation({
+  const cancelBookingsMutation = trpc.booking.cancel.useMutation({
     onSuccess(data, variables) {
       const allCancellationsWentThrough = data.every((cancelled) => cancelled)
       if (allCancellationsWentThrough) {
diff --git a/apps/scandic-web/lib/api/index.ts b/apps/scandic-web/lib/api/index.ts
index 5fc1173c1..532750f9e 100644
--- a/apps/scandic-web/lib/api/index.ts
+++ b/apps/scandic-web/lib/api/index.ts
@@ -100,14 +100,19 @@ export async function put(
 
 export async function remove(
   endpoint: Endpoint | `${Endpoint}/${string}`,
-  options: RequestOptionsWithOutBody,
+  options: RequestOptionsWithJSONBody,
   params = {}
 ) {
+  const { body, ...requestOptions } = options
   const url = new URL(env.API_BASEURL)
   url.pathname = endpoint
   url.search = new URLSearchParams(params).toString()
   return wrappedFetch(
     url,
-    merge.all([defaultOptions, { method: "DELETE" }, options])
+    merge.all([
+      defaultOptions,
+      { body: JSON.stringify(body), method: "DELETE" },
+      requestOptions,
+    ])
   )
 }
diff --git a/apps/scandic-web/server/routers/booking/input.ts b/apps/scandic-web/server/routers/booking/input.ts
index 8a87965a1..bbf444181 100644
--- a/apps/scandic-web/server/routers/booking/input.ts
+++ b/apps/scandic-web/server/routers/booking/input.ts
@@ -126,14 +126,9 @@ export const priceChangeInput = z.object({
   confirmationNumber: z.string(),
 })
 
-export const cancelBookingInput = z.object({
-  confirmationNumber: z.string(),
-  language: z.nativeEnum(Lang).transform((val) => langToApiLang[val]),
-})
-
-export const cancelManyBookingsInput = z.object({
+export const cancelBookingsInput = z.object({
   confirmationNumbers: z.array(z.string()),
-  language: z.nativeEnum(Lang).transform((val) => langToApiLang[val]),
+  language: z.nativeEnum(Lang),
 })
 
 export const guaranteeBookingInput = z.object({
diff --git a/apps/scandic-web/server/routers/booking/mutation.ts b/apps/scandic-web/server/routers/booking/mutation.ts
index f0d15af5a..ce648e7ec 100644
--- a/apps/scandic-web/server/routers/booking/mutation.ts
+++ b/apps/scandic-web/server/routers/booking/mutation.ts
@@ -5,8 +5,7 @@ import { router, safeProtectedServiceProcedure } from "@/server/trpc"
 
 import {
   addPackageInput,
-  cancelBookingInput,
-  cancelManyBookingsInput,
+  cancelBookingsInput,
   createBookingInput,
   guaranteeBookingInput,
   priceChangeInput,
@@ -113,14 +112,7 @@ export const bookingMutationRouter = router({
       return verifiedData.data
     }),
   cancel: safeProtectedServiceProcedure
-    .input(cancelBookingInput)
-    .mutation(async function ({ ctx, input }) {
-      const token = ctx.session?.token.access_token ?? ctx.serviceToken
-      const { confirmationNumber, language } = input
-      return await cancelBooking(confirmationNumber, language, token)
-    }),
-  cancelMany: safeProtectedServiceProcedure
-    .input(cancelManyBookingsInput)
+    .input(cancelBookingsInput)
     .mutation(async function ({ ctx, input }) {
       const token = ctx.session?.token.access_token ?? ctx.serviceToken
       const { confirmationNumbers, language } = input
@@ -297,7 +289,7 @@ export const bookingMutationRouter = router({
         api.endpoints.v1.Booking.packages(confirmationNumber),
         {
           headers,
-        } as RequestInit,
+        },
         [["language", language], ...codes.map((code) => ["codes", code])]
       )
 
diff --git a/apps/scandic-web/server/routers/booking/utils.ts b/apps/scandic-web/server/routers/booking/utils.ts
index 5149a618c..c983407b4 100644
--- a/apps/scandic-web/server/routers/booking/utils.ts
+++ b/apps/scandic-web/server/routers/booking/utils.ts
@@ -80,17 +80,11 @@ export async function getBooking(
 
 export async function cancelBooking(
   confirmationNumber: string,
-  language: string,
+  language: Lang,
   token: string
 ) {
-  const cancellationReason = {
-    reasonCode: "WEB-CANCEL",
-    reason: "WEB-CANCEL",
-  }
-
   const cancelBookingCounter = createCounter("booking", "cancel")
   const metricsCancelBooking = cancelBookingCounter.init({
-    cancellationReason,
     confirmationNumber,
     language,
   })
@@ -101,18 +95,24 @@ export async function cancelBooking(
     Authorization: `Bearer ${token}`,
   }
 
+  const booking = await getBooking(confirmationNumber, language, token)
+  if (!booking) {
+    metricsCancelBooking.noDataError({ confirmationNumber })
+    return null
+  }
+  const { firstName, lastName, email } = booking.guest
   const apiResponse = await api.remove(
     api.endpoints.v1.Booking.cancel(confirmationNumber),
     {
       headers,
-      body: JSON.stringify(cancellationReason),
-    } as RequestInit,
-    { language }
+      body: { firstName, lastName, email },
+    },
+    { language: toApiLang(language) }
   )
 
   if (!apiResponse.ok) {
     await metricsCancelBooking.httpError(apiResponse)
-    return false
+    return null
   }
 
   const apiJson = await apiResponse.json()