diff --git a/CHANGELOG.md b/CHANGELOG.md
index e4e8cb494f..ce7ac63f6c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15,6 +15,7 @@ Versioning](https://semver.org/spec/v2.0.0.html).
 - Add custom error message for batch orders when there are no available seats
 - Add purchase order reference modal for quote process in dashboard organization
 - Update english texts for batch orders
+- Uncheck payment method in sale tunnel during the batch order creation
 
 ### Fixed
 
diff --git a/src/frontend/js/api/lms/dummy.ts b/src/frontend/js/api/lms/dummy.ts
index 14bdda52c4..f18579f7c3 100644
--- a/src/frontend/js/api/lms/dummy.ts
+++ b/src/frontend/js/api/lms/dummy.ts
@@ -25,26 +25,32 @@ type JWTPayload = {
   username: string;
 };
 
-/* All JWT tokens will expire the 02 Feb 2026 ! */
+/* All JWT tokens will expire the 05 Feb 2027 ! */
 const JOANIE_DEV_DEMO_USER_JWT_TOKENS = {
-  user0:
-    'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ0b2tlbl90eXBlIjoiYWNjZXNzIiwiZXhwIjoxNzcwMjIzOTY5LCJpYXQiOjE3Mzg2ODc5NjksImp0aSI6ImQwZmU1Zjg5ZjFhYTQ4YmM5NDhmNWU4ODFkNTNhNTU2IiwiZW1haWwiOiJwc21pdGhAZXhhbXBsZS5vcmciLCJsYW5ndWFnZSI6ImVuLXVzIiwidXNlcm5hbWUiOiJ1c2VyMCIsImZ1bGxfbmFtZSI6Ik90aGVyIE93bmVyIn0.eCawfaCzpO7U7iUPC1TE_XYDiRjq_crI93GqE8Fj8zc',
-  user1:
-    'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ0b2tlbl90eXBlIjoiYWNjZXNzIiwiZXhwIjoxNzcwMjIzOTY5LCJpYXQiOjE3Mzg2ODc5NjksImp0aSI6ImIwYjk3YjZkZjFlMzRkMTg4NjFiMGFhMjcxYWI0YWU1IiwiZW1haWwiOiJzYW1wc29uYW5uYUBleGFtcGxlLm9yZyIsImxhbmd1YWdlIjoiZW4tdXMiLCJ1c2VybmFtZSI6InVzZXIxIiwiZnVsbF9uYW1lIjoiT3RoZXIgT3duZXIifQ.yd46_63iuw19zmzH8aVNRAVAvAE4VGH8W8BjmFs6PPU',
-  user2:
-    'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ0b2tlbl90eXBlIjoiYWNjZXNzIiwiZXhwIjoxNzcwMjIzOTY5LCJpYXQiOjE3Mzg2ODc5NjksImp0aSI6ImNmYzY2OTNmY2Q5ZTRlZGViM2Y2NzU1MTZhNDIzMTdiIiwiZW1haWwiOiJsb3BlemFtYmVyQGV4YW1wbGUub3JnIiwibGFuZ3VhZ2UiOiJlbi11cyIsInVzZXJuYW1lIjoidXNlcjIiLCJmdWxsX25hbWUiOiJPdGhlciBPd25lciJ9.TlFILOXY-wK29M_BUgDKgjdOovSfEIlw5cNXed6ZV3w',
-  user3:
-    'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ0b2tlbl90eXBlIjoiYWNjZXNzIiwiZXhwIjoxNzcwMjIzOTY5LCJpYXQiOjE3Mzg2ODc5NjksImp0aSI6IjA4ZTcxZGJjYWIyMDRjMmZhZjgyMDVjZTRiNTliMjZiIiwiZW1haWwiOiJsb25nZWxpemFiZXRoQGV4YW1wbGUub3JnIiwibGFuZ3VhZ2UiOiJlbi11cyIsInVzZXJuYW1lIjoidXNlcjMiLCJmdWxsX25hbWUiOiJPdGhlciBPd25lciJ9.8NxYyjc567lO2Yc7me-TQr8PNvKqB5VLRzHd1Z4vA4U',
-  user4:
-    'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ0b2tlbl90eXBlIjoiYWNjZXNzIiwiZXhwIjoxNzcwMjIzOTY5LCJpYXQiOjE3Mzg2ODc5NjksImp0aSI6ImVmZGRkM2Q0YTdmZDQ4ZmFhYmZkM2Q2OTI4YzMwM2U4IiwiZW1haWwiOiJqb25lc2plbm5pZmVyQGV4YW1wbGUub3JnIiwibGFuZ3VhZ2UiOiJlbi11cyIsInVzZXJuYW1lIjoidXNlcjQiLCJmdWxsX25hbWUiOiJPdGhlciBPd25lciJ9.Wn5CKuNPn0s4B_76Mxd3zTKqdUMaZGV456bhZ-fDe-o',
+  admin:
+    'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ0b2tlbl90eXBlIjoiYWNjZXNzIiwiZXhwIjoxODAxODMyNDI4LCJpYXQiOjE3NzAyOTY0MjgsImp0aSI6IjY2NWQ2N2Y3ZTU4MzQyMDc4YTg1MWNjNTFhNGMyMDg5IiwiZW1haWwiOiJhZG1pbkBleGFtcGxlLmNvbSIsImxhbmd1YWdlIjoiZW4tdXMiLCJ1c2VybmFtZSI6ImFkbWluIiwiZnVsbF9uYW1lIjoiIn0.yDC39WViIYl_pnJAjTedpVNBl14lSXZsXbDv-604VOo',
   organization_owner:
-    'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ0b2tlbl90eXBlIjoiYWNjZXNzIiwiZXhwIjoxNzcwMjIzOTY5LCJpYXQiOjE3Mzg2ODc5NjksImp0aSI6ImRiYmU2ZGExZjhmNDQzNDA4N2U2NzQ0YTIzM2JmNjFiIiwiZW1haWwiOiJkZXZlbG9wZXIrb3JnYW5pemF0aW9uX293bmVyQGV4YW1wbGUuY29tIiwibGFuZ3VhZ2UiOiJlbi11cyIsInVzZXJuYW1lIjoib3JnYW5pemF0aW9uX293bmVyIiwiZnVsbF9uYW1lIjoiT3JnYSBPd25lciJ9.a6QjOAOxCw7ZFKvg8OCcUaW8Xhbmfuqy3cwIqUCPfzE',
+    'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ0b2tlbl90eXBlIjoiYWNjZXNzIiwiZXhwIjoxODAxODMyNDI4LCJpYXQiOjE3NzAyOTY0MjgsImp0aSI6IjlmY2EyZTA5MjcxYjRmZDQ5MTAzMGQ5YjJkMzk3MDhhIiwiZW1haWwiOiJkZXZlbG9wZXIrb3JnYW5pemF0aW9uX293bmVyQGV4YW1wbGUuY29tIiwibGFuZ3VhZ2UiOiJmci1mciIsInVzZXJuYW1lIjoib3JnYW5pemF0aW9uX293bmVyIiwiZnVsbF9uYW1lIjoiT3JnYSBPd25lciJ9.lf2ePQ-xZ-uHY6azh32kFIU3JvzKn3YJZZjmkApqBuE',
   student_user:
-    'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ0b2tlbl90eXBlIjoiYWNjZXNzIiwiZXhwIjoxNzcwMjIzOTY5LCJpYXQiOjE3Mzg2ODc5NjksImp0aSI6IjNhMGExYjM0OWEwNDQxNTg5ODU4NGUwZjMwNTc5M2EwIiwiZW1haWwiOiJkZXZlbG9wZXIrc3R1ZGVudF91c2VyQGV4YW1wbGUuY29tIiwibGFuZ3VhZ2UiOiJmci1mciIsInVzZXJuYW1lIjoic3R1ZGVudF91c2VyIiwiZnVsbF9uYW1lIjoiXHUwMGM5dHVkaWFudCJ9.3VvjPXwtuNA684hSIem3X2uFD-4WH8fipVDXMsi1cAc',
+    'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ0b2tlbl90eXBlIjoiYWNjZXNzIiwiZXhwIjoxODAxODMyNDI4LCJpYXQiOjE3NzAyOTY0MjgsImp0aSI6ImU0M2U3NDg4NDBlYzRkMTI4YTUzMTZmZDY0M2Y1ZWZjIiwiZW1haWwiOiJkZXZlbG9wZXIrc3R1ZGVudF91c2VyQGV4YW1wbGUuY29tIiwibGFuZ3VhZ2UiOiJlbi11cyIsInVzZXJuYW1lIjoic3R1ZGVudF91c2VyIiwiZnVsbF9uYW1lIjoiXHUwMGM5dHVkaWFudCJ9.KViEfiPEv9UGq3nuYxoXBOcJDXxoBfr-sPZEqEJtve4',
   second_student_user:
-    'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ0b2tlbl90eXBlIjoiYWNjZXNzIiwiZXhwIjoxNzcwMjIzOTY5LCJpYXQiOjE3Mzg2ODc5NjksImp0aSI6Ijg5ZDIyNDJjODRkODRiNThiZWVkYjg1NmU2MGNiM2FiIiwiZW1haWwiOiJkZXZlbG9wZXIrc2Vjb25kX3N0dWRlbnRfdXNlckBleGFtcGxlLmNvbSIsImxhbmd1YWdlIjoiZnItZnIiLCJ1c2VybmFtZSI6InNlY29uZF9zdHVkZW50X3VzZXIiLCJmdWxsX25hbWUiOiJcdTAwYzl0dWRpYW50IDAwMiJ9.p5p4Ku0w8mHortWW9TYHTJgORF9wnfCpq-6pvBRjU0Y',
-  admin:
-    'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ0b2tlbl90eXBlIjoiYWNjZXNzIiwiZXhwIjoxNzcwMjIzOTY5LCJpYXQiOjE3Mzg2ODc5NjksImp0aSI6Ijk4M2UzNmI5MTUzODQ2Mjg4ZGMxNWNjOTAwNDgwMDA4IiwiZW1haWwiOiJhZG1pbkBleGFtcGxlLmNvbSIsImxhbmd1YWdlIjoiZW4tdXMiLCJ1c2VybmFtZSI6ImFkbWluIiwiZnVsbF9uYW1lIjoiIn0.VuSqfh4l0vtIDSdkEgCNyciiOhlFlMAsf5u5snm2Avw',
+    'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ0b2tlbl90eXBlIjoiYWNjZXNzIiwiZXhwIjoxODAxODMyNDI4LCJpYXQiOjE3NzAyOTY0MjgsImp0aSI6IjIzZDI1OGI5ZmIxMzQyMWFiNDlmNDk1M2RjMjRkZjM5IiwiZW1haWwiOiJkZXZlbG9wZXIrc2Vjb25kX3N0dWRlbnRfdXNlckBleGFtcGxlLmNvbSIsImxhbmd1YWdlIjoiZnItZnIiLCJ1c2VybmFtZSI6InNlY29uZF9zdHVkZW50X3VzZXIiLCJmdWxsX25hbWUiOiJcdTAwYzl0dWRpYW50IDAwMiJ9.WOSPWNi9XRAap4Cd0Nzwp7A-3M1Rkp4A2k9yFI1sUdQ',
+  user4:
+    'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ0b2tlbl90eXBlIjoiYWNjZXNzIiwiZXhwIjoxODAxODMyNDI4LCJpYXQiOjE3NzAyOTY0MjgsImp0aSI6ImM0ZThjNDhmYTVhMjQyOTZhMzliMzQzNDI5MTYxYmU2IiwiZW1haWwiOiJkdXN0aW5tYXJ0aW5lekBleGFtcGxlLmNvbSIsImxhbmd1YWdlIjoiZW4tdXMiLCJ1c2VybmFtZSI6InVzZXI0IiwiZnVsbF9uYW1lIjoiSmFyZWQgQmVuc29uIn0.J6q6Vgn-TJBCF1HJk7jf8OWjdI5zBjCHYAdoJeVB_Lk',
+  user5:
+    'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ0b2tlbl90eXBlIjoiYWNjZXNzIiwiZXhwIjoxODAxODMyNDI4LCJpYXQiOjE3NzAyOTY0MjgsImp0aSI6ImEzMzNhNjZjMTJmODQ5ZDNhY2FmMzFjNDc1NzVmZjFiIiwiZW1haWwiOiJnYWNvc3RhQGV4YW1wbGUub3JnIiwibGFuZ3VhZ2UiOiJlbi11cyIsInVzZXJuYW1lIjoidXNlcjUiLCJmdWxsX25hbWUiOiJKZXJyeSBKYW1lcyJ9.E9Cs8ETQveN7VNq0gq3enIBFWbth3ESZ1JHrIaeQvkY',
+  user6:
+    'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ0b2tlbl90eXBlIjoiYWNjZXNzIiwiZXhwIjoxODAxODMyNDI4LCJpYXQiOjE3NzAyOTY0MjgsImp0aSI6ImNhZDAzOTFkMTk5NjQwNWQ5YThmZWYzMGQ4YzBiZTNiIiwiZW1haWwiOiJtb3JnYW5kb25uYUBleGFtcGxlLmNvbSIsImxhbmd1YWdlIjoiZnItZnIiLCJ1c2VybmFtZSI6InVzZXI2IiwiZnVsbF9uYW1lIjoiS3Jpc3RpbiBOb2JsZSJ9.FowqEHxSh72wGq52QTm6aG3U1GZfcJBQseiSPm4RXOc',
+  user7:
+    'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ0b2tlbl90eXBlIjoiYWNjZXNzIiwiZXhwIjoxODAxODMyNDI4LCJpYXQiOjE3NzAyOTY0MjgsImp0aSI6ImJhZjUxYjM4OWNhNzQwYWVhMzk3Y2EwY2QzOGFmYzczIiwiZW1haWwiOiJ0dXJuZXJtYWRpc29uQGV4YW1wbGUubmV0IiwibGFuZ3VhZ2UiOiJmci1mciIsInVzZXJuYW1lIjoidXNlcjciLCJmdWxsX25hbWUiOiJCZWNreSBWYXNxdWV6In0.mtbflgik7w7PEVJ-W6mjL2Wnq-bKrugGlWkkmc_jxxU',
+  user8:
+    'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ0b2tlbl90eXBlIjoiYWNjZXNzIiwiZXhwIjoxODAxODMyNDI4LCJpYXQiOjE3NzAyOTY0MjgsImp0aSI6IjM4NWNiZDljMTI4MjQxMDk4YjZlOGFmYjI2ZjA1Y2Y0IiwiZW1haWwiOiJyb2JlcnQ3NUBleGFtcGxlLm5ldCIsImxhbmd1YWdlIjoiZW4tdXMiLCJ1c2VybmFtZSI6InVzZXI4IiwiZnVsbF9uYW1lIjoiS2V2aW4gQm9vbmUifQ.c_mwfr72SC49hdNOupjgPlplPXBOrm0Gb5d5KuC6NI4',
+  user9:
+    'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ0b2tlbl90eXBlIjoiYWNjZXNzIiwiZXhwIjoxODAxODMyNDI4LCJpYXQiOjE3NzAyOTY0MjgsImp0aSI6IjI5MGVlN2UxZDQ5YTRjZTJiOTk1ZGMyOWExN2QyOTZiIiwiZW1haWwiOiJjbGFya2tpbWJlcmx5QGV4YW1wbGUubmV0IiwibGFuZ3VhZ2UiOiJlbi11cyIsInVzZXJuYW1lIjoidXNlcjkiLCJmdWxsX25hbWUiOiJKb2huIE93ZW5zIn0.ke-2g7942a2LgBR2OpMxYg-ozB7269ymWx8nzaJs-kc',
+  user10:
+    'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ0b2tlbl90eXBlIjoiYWNjZXNzIiwiZXhwIjoxODAxODMyNDI4LCJpYXQiOjE3NzAyOTY0MjgsImp0aSI6ImMxMWJhNDY3YWY0YTRjMWFhZDIwOTZhOGU1MDA3NTJiIiwiZW1haWwiOiJiZW5qYW1pbjU5QGV4YW1wbGUub3JnIiwibGFuZ3VhZ2UiOiJlbi11cyIsInVzZXJuYW1lIjoidXNlcjEwIiwiZnVsbF9uYW1lIjoiUm9uYWxkIEpvaG5zb24ifQ.c_AEOp6jD_K0xsJK4ZvkZcGnKlD3wmm_eJ2UEBGY5v0',
+  user11:
+    'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ0b2tlbl90eXBlIjoiYWNjZXNzIiwiZXhwIjoxODAxODMyNDI4LCJpYXQiOjE3NzAyOTY0MjgsImp0aSI6Ijc5ZDg3NDkxZDU0NDRmMWVhZDAzYTYyMmQ0NWI0Y2E1IiwiZW1haWwiOiJhbWFuZGExMUBleGFtcGxlLm5ldCIsImxhbmd1YWdlIjoiZW4tdXMiLCJ1c2VybmFtZSI6InVzZXIxMSIsImZ1bGxfbmFtZSI6IkNoZXJ5bCBUYXlsb3IifQ.e6DEq75EHvCgtjf7aLr7Tk1DyZ9-4f-n-W8DXySCZZM',
 };
 
 export type DevDemoUser = keyof typeof JOANIE_DEV_DEMO_USER_JWT_TOKENS;
diff --git a/src/frontend/js/components/SaleTunnel/SaleTunnelInformation/SaleTunnelInformationGroup.tsx b/src/frontend/js/components/SaleTunnel/SaleTunnelInformation/SaleTunnelInformationGroup.tsx
index 6a19e5e0dc..875a52a043 100644
--- a/src/frontend/js/components/SaleTunnel/SaleTunnelInformation/SaleTunnelInformationGroup.tsx
+++ b/src/frontend/js/components/SaleTunnel/SaleTunnelInformation/SaleTunnelInformationGroup.tsx
@@ -169,7 +169,7 @@ const BatchOrderForm = () => {
     signatory_email: '',
     signatory_telephone: '',
     nb_seats: 0,
-    payment_method: PaymentMethod.PURCHASE_ORDER,
+    payment_method: undefined as any,
     funding_amount: 0,
   };
 
diff --git a/src/frontend/js/components/SaleTunnel/SaleTunnelInformation/StepContent.tsx b/src/frontend/js/components/SaleTunnel/SaleTunnelInformation/StepContent.tsx
index be1c355b52..aab0c89cb4 100644
--- a/src/frontend/js/components/SaleTunnel/SaleTunnelInformation/StepContent.tsx
+++ b/src/frontend/js/components/SaleTunnel/SaleTunnelInformation/StepContent.tsx
@@ -211,6 +211,7 @@ export const StepContent = ({
     value: organization.id,
   }));
   const [otherBillingAddress, setOtherBillingAddress] = useState(false);
+  const organizationId = form.watch('organization_id');
 
   return (
     <div className="step-content">
@@ -525,11 +526,14 @@ export const StepContent = ({
         </div>
         <FormattedMessage {...messages.recommandation} />
         <Select
-          {...register('organization_id')}
           label={intl.formatMessage(messages.participatingOrganisations)}
           clearable
           options={orgOptions}
           className="recommandation"
+          value={organizationId ?? ''}
+          onChange={(e) => {
+            form.setValue('organization_id', e.target.value as string);
+          }}
         />
       </div>
     </div>
diff --git a/src/frontend/js/components/SaleTunnel/index.full-process-b2b.spec.tsx b/src/frontend/js/components/SaleTunnel/index.full-process-b2b.spec.tsx
index c31ff5c545..b462d9a81e 100644
--- a/src/frontend/js/components/SaleTunnel/index.full-process-b2b.spec.tsx
+++ b/src/frontend/js/components/SaleTunnel/index.full-process-b2b.spec.tsx
@@ -2,6 +2,7 @@ import { screen, within } from '@testing-library/react';
 import fetchMock from 'fetch-mock';
 import queryString from 'query-string';
 import userEvent from '@testing-library/user-event';
+import { PaymentMethod } from 'components/PaymentInterfaces/types';
 import {
   RichieContextFactory as mockRichieContextFactory,
   PacedCourseFactory,
@@ -17,6 +18,7 @@ import {
   OfferingBatchOrderFactory,
   BatchOrderReadFactory,
   CredentialOrderFactory,
+  OrganizationFactory,
 } from 'utils/test/factories/joanie';
 import { CourseRun, NOT_CANCELED_ORDER_STATES, OrderState } from 'types/Joanie';
 import { Priority } from 'types';
@@ -82,9 +84,7 @@ describe('SaleTunnel', () => {
     const product = ProductFactory().one();
     const offering = OfferingFactory({ course, product, is_withdrawable: false }).one();
     const paymentPlan = PaymentPlanFactory().one();
-    const offeringOrganization = OfferingBatchOrderFactory({
-      product: { id: product.id, title: product.title },
-    }).one();
+    const organizations = OrganizationFactory().many(3);
 
     fetchMock.get(
       `https://joanie.endpoint/api/v1.0/courses/${course.code}/products/${product.id}/`,
@@ -105,7 +105,7 @@ describe('SaleTunnel', () => {
     );
     fetchMock.get(
       `https://joanie.endpoint/api/v1.0/offerings/${offering.id}/get-organizations/`,
-      offeringOrganization,
+      organizations,
     );
 
     render(<CourseProductItem productId={product.id} course={course} />, {
@@ -214,6 +214,33 @@ describe('SaleTunnel', () => {
     await user.type($nbParticipants, '13');
     expect($nbParticipants).toHaveValue(13);
 
+    // Financing step
+    await user.click(screen.getByRole('button', { name: 'Next' }));
+
+    const $purchaseOrderRadio = await screen.findByLabelText('Purchase order');
+    await user.click($purchaseOrderRadio);
+
+    const $fundingEntity = screen.getByLabelText('Entity name');
+    await user.type($fundingEntity, 'OPCO');
+    expect($fundingEntity).toHaveValue('OPCO');
+
+    const $fundingAmount = screen.getByLabelText('Amount covered');
+    await user.type($fundingAmount, '5000');
+    expect($fundingAmount).toHaveValue(5000);
+
+    const organizationComboboxes = screen.getAllByRole('combobox', {
+      name: 'Participating organizations',
+    });
+
+    const $organizationSelect = organizationComboboxes[organizationComboboxes.length - 1];
+    await user.click($organizationSelect);
+    const organizationMenu: HTMLDivElement = screen.getByRole('listbox', {
+      name: 'Participating organizations',
+    });
+    expectMenuToBeOpen(organizationMenu);
+    const firstOrg = organizations[0];
+    await user.click(screen.getByRole('option', { name: firstOrg.title }));
+
     // Submit the batch order
     const batchOrderRead = BatchOrderReadFactory().one();
     fetchMock.post('https://joanie.endpoint/api/v1.0/batch-orders/', batchOrderRead);
@@ -229,6 +256,39 @@ describe('SaleTunnel', () => {
       'href',
       `/en/dashboard/batch-orders/${batchOrderRead.id}`,
     );
+
+    // Verify the batch order payload contains all required and optional fields
+    const batchOrderCalls = fetchMock.calls('https://joanie.endpoint/api/v1.0/batch-orders/');
+    expect(batchOrderCalls).toHaveLength(1);
+    const batchOrderCall = batchOrderCalls[0];
+    const batchOrderRequest = batchOrderCall[1];
+    const batchOrderPayload = JSON.parse(batchOrderRequest?.body as string);
+
+    // Verify all payload fields
+    expect(batchOrderPayload).toEqual({
+      offering_id: offering.id,
+      company_name: 'GIP-FUN',
+      identification_number: '789 242 229 01694',
+      address: '61 Bis Rue de la Glaciere',
+      postcode: '75013',
+      city: 'Paris',
+      country: 'FR',
+      administrative_lastname: 'Doe',
+      administrative_firstname: 'John',
+      administrative_profession: 'HR',
+      administrative_email: 'john.doe@fun-mooc.com',
+      administrative_telephone: '+338203920103',
+      signatory_lastname: 'Doe',
+      signatory_firstname: 'John',
+      signatory_profession: 'CEO',
+      signatory_email: 'john.doe@fun-mooc.com',
+      signatory_telephone: '+338203920103',
+      nb_seats: '13',
+      payment_method: PaymentMethod.PURCHASE_ORDER,
+      funding_entity: 'OPCO',
+      funding_amount: '5000',
+      organization_id: firstOrg.id,
+    });
   }, 30000);
 
   it('tests the entire process of subscribing with a voucher from a batch order', async () => {
@@ -491,6 +551,12 @@ describe('SaleTunnel', () => {
     await user.type($nbParticipants, '13');
     expect($nbParticipants).toHaveValue(13);
 
+    // Financing step
+    await user.click(screen.getByRole('button', { name: 'Next' }));
+
+    const $purchaseOrderRadio = await screen.findByLabelText('Purchase order');
+    await user.click($purchaseOrderRadio);
+
     fetchMock.post('https://joanie.endpoint/api/v1.0/batch-orders/', {
       status: 422,
       body: {