diff --git a/src/features/b2b/api/b2bApi.ts b/src/features/b2b/api/b2bApi.ts
index a665087..7a4d1cb 100644
--- a/src/features/b2b/api/b2bApi.ts
+++ b/src/features/b2b/api/b2bApi.ts
@@ -34,7 +34,7 @@ async function doB2bRequest<T>(
 }
 
 export interface CreatePurchaseRequestBody {
-  usdt_amount: number | string
+  rub_amount: number | string
   comment?: string | null
   target_wallet_chain?: string | null
   target_wallet_address?: string | null
diff --git a/src/widgets/legal-converter/model/useLegalConverterForm.ts b/src/widgets/legal-converter/model/useLegalConverterForm.ts
index a2b3bdd..e95c0df 100644
--- a/src/widgets/legal-converter/model/useLegalConverterForm.ts
+++ b/src/widgets/legal-converter/model/useLegalConverterForm.ts
@@ -61,7 +61,7 @@ export function useLegalConverterForm() {
     })
 
     submitRequest(
-      { usdt_amount: numAmount, comment },
+      { rub_amount: numAmount, comment },
       {
         onSuccess: () => {
           setNotice('success')