diff --git a/src/api/transactions.rs b/src/api/transactions.rs
index 407c74a..85ce032 100644
--- a/src/api/transactions.rs
+++ b/src/api/transactions.rs
@@ -1,8 +1,8 @@
 use std::{borrow::Cow, cell::RefCell, sync::Arc};
 
-use axum::{Router, routing::post};
+use axum::{Router, http::StatusCode, routing::post};
 use bank_core::{
-    Name, NameOrUuid, USER_ACCOUNT_PATTERN, make_schemas,
+    ApiError, Name, NameOrUuid, USER_ACCOUNT_PATTERN, make_schemas,
     pagination::Pagination,
     transaction::{FullTransaction, Transaction, TransactionQuery},
 };
@@ -349,13 +349,28 @@ pub async fn make_payment(
         NameOrUuid::Id(uuid) => Accounts::by_id(&client, uuid).await?,
         NameOrUuid::Name(name) => Accounts::get_for_user(&client, user_id, &*name).await?,
     }) else {
-        todo!("from account doesn't exist")
+        return Err(ApiError::const_new(
+            StatusCode::NOT_FOUND,
+            "transaction.from.not_found",
+            "Not Found",
+        )
+        .into());
     };
     let Some((to_user, to)) = to.account_id(&client).await? else {
-        todo!("to account doesn't exist")
+        return Err(ApiError::const_new(
+            StatusCode::NOT_FOUND,
+            "transaction.target.not_found",
+            "Not Found",
+        )
+        .into());
     };
     if from.balance < amount {
-        todo!("not enough money")
+        return Err(ApiError::const_new(
+            StatusCode::BAD_REQUEST,
+            "transaction.insufficient_funds",
+            "Insufficient funds",
+        )
+        .into());
     }
     let update_balance_stmt = client
         .prepare_cached("update accounts set balance = balance + $2 where id = $1")