diff --git a/programs/openbook-v2/src/accounts_ix/settle_funds.rs b/programs/openbook-v2/src/accounts_ix/settle_funds.rs
index 467c9b615..50eb5ecc3 100644
--- a/programs/openbook-v2/src/accounts_ix/settle_funds.rs
+++ b/programs/openbook-v2/src/accounts_ix/settle_funds.rs
@@ -1,3 +1,4 @@
+use crate::error::OpenBookError;
 use crate::state::*;
 use anchor_lang::prelude::*;
 use anchor_spl::token::{Token, TokenAccount};
@@ -11,8 +12,8 @@ pub struct SettleFunds<'info> {
 
     #[account(
         mut,
-        has_one = owner,
         has_one = market,
+        constraint = open_orders_account.load()?.is_owner_or_delegate(owner.key()) @ OpenBookError::NoOwnerOrDelegate
     )]
     pub open_orders_account: AccountLoader<'info, OpenOrdersAccount>,
     #[account(
@@ -30,12 +31,14 @@ pub struct SettleFunds<'info> {
     pub market_quote_vault: Account<'info, TokenAccount>,
     #[account(
         mut,
-        token::mint = market_base_vault.mint
+        token::mint = market_base_vault.mint,
+        constraint = user_base_account.owner == open_orders_account.load()?.owner
     )]
     pub user_base_account: Account<'info, TokenAccount>,
     #[account(
         mut,
-        token::mint = market_quote_vault.mint
+        token::mint = market_quote_vault.mint,
+        constraint = user_quote_account.owner == open_orders_account.load()?.owner
     )]
     pub user_quote_account: Account<'info, TokenAccount>,
     #[account(
diff --git a/programs/openbook-v2/src/accounts_ix/settle_funds_expired.rs b/programs/openbook-v2/src/accounts_ix/settle_funds_expired.rs
index 0181f0228..23f712547 100644
--- a/programs/openbook-v2/src/accounts_ix/settle_funds_expired.rs
+++ b/programs/openbook-v2/src/accounts_ix/settle_funds_expired.rs
@@ -40,7 +40,7 @@ pub struct SettleFundsExpired<'info> {
     #[account(
         mut,
         token::mint = market_quote_vault.mint,
-        constraint = user_base_account.owner == open_orders_account.load()?.owner
+        constraint = user_quote_account.owner == open_orders_account.load()?.owner
     )]
     pub user_quote_account: Account<'info, TokenAccount>,
     #[account(