diff --git a/programs/mango-v4/src/error.rs b/programs/mango-v4/src/error.rs
index 59af64ddd..732bc0422 100644
--- a/programs/mango-v4/src/error.rs
+++ b/programs/mango-v4/src/error.rs
@@ -16,4 +16,6 @@ pub enum MangoError {
     InvalidMarginTradeTargetCpiProgram,
     #[msg("")]
     HealthMustBePositive,
+    #[msg("The account is bankrupt")]
+    IsBankrupt,
 }
diff --git a/programs/mango-v4/src/instructions/deposit.rs b/programs/mango-v4/src/instructions/deposit.rs
index f8b65046b..0f8ab05ad 100644
--- a/programs/mango-v4/src/instructions/deposit.rs
+++ b/programs/mango-v4/src/instructions/deposit.rs
@@ -4,6 +4,7 @@ use anchor_spl::token::Token;
 use anchor_spl::token::TokenAccount;
 use fixed::types::I80F48;
 
+use crate::error::*;
 use crate::state::*;
 
 #[derive(Accounts)]
@@ -55,6 +56,8 @@ pub fn deposit(ctx: Context<Deposit>, amount: u64) -> Result<()> {
 
     // Get the account's position for that token index
     let mut account = ctx.accounts.account.load_mut()?;
+    require!(!account.is_bankrupt, MangoError::IsBankrupt);
+
     let (position, position_index) = account.token_account_map.get_mut_or_create(token_index)?;
 
     // Update the bank and position
diff --git a/programs/mango-v4/src/instructions/liq_token_with_token.rs b/programs/mango-v4/src/instructions/liq_token_with_token.rs
index 254f3928d..d904b6cf8 100644
--- a/programs/mango-v4/src/instructions/liq_token_with_token.rs
+++ b/programs/mango-v4/src/instructions/liq_token_with_token.rs
@@ -38,7 +38,10 @@ pub fn liq_token_with_token(
     let account_retriever = ScanningAccountRetriever::new(ctx.remaining_accounts, group_pk)?;
 
     let mut liqor = ctx.accounts.liqor.load_mut()?;
+    require!(!liqor.is_bankrupt, MangoError::IsBankrupt);
+
     let mut liqee = ctx.accounts.liqee.load_mut()?;
+    require!(!liqee.is_bankrupt, MangoError::IsBankrupt);
 
     // Initial liqee health check
     let mut liqee_health_cache = health_cache_for_liqee(&liqee, &account_retriever)?;
diff --git a/programs/mango-v4/src/instructions/margin_trade.rs b/programs/mango-v4/src/instructions/margin_trade.rs
index 2787f9833..a0f04987e 100644
--- a/programs/mango-v4/src/instructions/margin_trade.rs
+++ b/programs/mango-v4/src/instructions/margin_trade.rs
@@ -27,6 +27,7 @@ pub fn margin_trade<'key, 'accounts, 'remaining, 'info>(
 ) -> Result<()> {
     let group = ctx.accounts.group.load()?;
     let mut account = ctx.accounts.account.load_mut()?;
+    require!(!account.is_bankrupt, MangoError::IsBankrupt);
 
     // remaining_accounts layout is expected as follows
     // * banks_len number of banks
diff --git a/programs/mango-v4/src/instructions/place_perp_order.rs b/programs/mango-v4/src/instructions/place_perp_order.rs
index 185218fca..5327dca2e 100644
--- a/programs/mango-v4/src/instructions/place_perp_order.rs
+++ b/programs/mango-v4/src/instructions/place_perp_order.rs
@@ -1,5 +1,6 @@
 use anchor_lang::prelude::*;
 
+use crate::error::*;
 use crate::state::{
     oracle_price, Book, EventQueueHeader, Group, MangoAccount, OrderType, PerpMarket, Queue, Side,
 };
@@ -49,6 +50,7 @@ pub fn place_perp_order(
     limit: u8,
 ) -> Result<()> {
     let mut mango_account = ctx.accounts.account.load_mut()?;
+    require!(!mango_account.is_bankrupt, MangoError::IsBankrupt);
     let mango_account_pk = ctx.accounts.account.key();
 
     let mut perp_market = ctx.accounts.perp_market.load_mut()?;
diff --git a/programs/mango-v4/src/instructions/serum3_cancel_order.rs b/programs/mango-v4/src/instructions/serum3_cancel_order.rs
index 12241489a..4a3967b18 100644
--- a/programs/mango-v4/src/instructions/serum3_cancel_order.rs
+++ b/programs/mango-v4/src/instructions/serum3_cancel_order.rs
@@ -95,6 +95,8 @@ pub fn serum3_cancel_order(
     //
     {
         let account = ctx.accounts.account.load()?;
+        require!(!account.is_bankrupt, MangoError::IsBankrupt);
+
         let serum_market = ctx.accounts.serum_market.load()?;
 
         // Validate open_orders
diff --git a/programs/mango-v4/src/instructions/serum3_create_open_orders.rs b/programs/mango-v4/src/instructions/serum3_create_open_orders.rs
index 83547fdff..7ed19c761 100644
--- a/programs/mango-v4/src/instructions/serum3_create_open_orders.rs
+++ b/programs/mango-v4/src/instructions/serum3_create_open_orders.rs
@@ -1,5 +1,6 @@
 use anchor_lang::prelude::*;
 
+use crate::error::*;
 use crate::state::*;
 
 #[derive(Accounts)]
@@ -51,6 +52,7 @@ pub fn serum3_create_open_orders(ctx: Context<Serum3CreateOpenOrders>) -> Result
 
     let serum_market = ctx.accounts.serum_market.load()?;
     let mut account = ctx.accounts.account.load_mut()?;
+    require!(!account.is_bankrupt, MangoError::IsBankrupt);
     let serum_account = account
         .serum3_account_map
         .create(serum_market.market_index)?;
diff --git a/programs/mango-v4/src/instructions/serum3_liq_force_cancel_orders.rs b/programs/mango-v4/src/instructions/serum3_liq_force_cancel_orders.rs
index a58dfc2d6..87575601d 100644
--- a/programs/mango-v4/src/instructions/serum3_liq_force_cancel_orders.rs
+++ b/programs/mango-v4/src/instructions/serum3_liq_force_cancel_orders.rs
@@ -65,6 +65,7 @@ pub fn serum3_liq_force_cancel_orders(
     //
     {
         let account = ctx.accounts.account.load()?;
+        require!(!account.is_bankrupt, MangoError::IsBankrupt);
         let serum_market = ctx.accounts.serum_market.load()?;
 
         // Validate open_orders
diff --git a/programs/mango-v4/src/instructions/serum3_place_order.rs b/programs/mango-v4/src/instructions/serum3_place_order.rs
index 5accc9cb4..b7ea60bfd 100644
--- a/programs/mango-v4/src/instructions/serum3_place_order.rs
+++ b/programs/mango-v4/src/instructions/serum3_place_order.rs
@@ -157,6 +157,7 @@ pub fn serum3_place_order(
     //
     {
         let account = ctx.accounts.account.load()?;
+        require!(!account.is_bankrupt, MangoError::IsBankrupt);
         let serum_market = ctx.accounts.serum_market.load()?;
 
         // Validate open_orders
@@ -241,7 +242,7 @@ pub fn serum3_place_order(
     let health =
         compute_health_from_fixed_accounts(&account, HealthType::Init, &ctx.remaining_accounts)?;
     msg!("health: {}", health);
-    require!(health >= 0, MangoError::SomeError);
+    require!(health >= 0, MangoError::HealthMustBePositive);
 
     Ok(())
 }
diff --git a/programs/mango-v4/src/instructions/serum3_settle_funds.rs b/programs/mango-v4/src/instructions/serum3_settle_funds.rs
index f19d6c5b0..a297cf623 100644
--- a/programs/mango-v4/src/instructions/serum3_settle_funds.rs
+++ b/programs/mango-v4/src/instructions/serum3_settle_funds.rs
@@ -64,6 +64,7 @@ pub fn serum3_settle_funds(ctx: Context<Serum3SettleFunds>) -> Result<()> {
     //
     {
         let account = ctx.accounts.account.load()?;
+        require!(!account.is_bankrupt, MangoError::IsBankrupt);
         let serum_market = ctx.accounts.serum_market.load()?;
 
         // Validate open_orders
diff --git a/programs/mango-v4/src/instructions/withdraw.rs b/programs/mango-v4/src/instructions/withdraw.rs
index e329f6a28..4c80312b2 100644
--- a/programs/mango-v4/src/instructions/withdraw.rs
+++ b/programs/mango-v4/src/instructions/withdraw.rs
@@ -58,6 +58,8 @@ pub fn withdraw(ctx: Context<Withdraw>, amount: u64, allow_borrow: bool) -> Resu
 
     // Get the account's position for that token index
     let mut account = ctx.accounts.account.load_mut()?;
+    require!(!account.is_bankrupt, MangoError::IsBankrupt);
+
     let (position, position_index) = account.token_account_map.get_mut_or_create(token_index)?;
 
     // The bank will also be passed in remainingAccounts. Use an explicit scope
@@ -103,7 +105,7 @@ pub fn withdraw(ctx: Context<Withdraw>, amount: u64, allow_borrow: bool) -> Resu
     let health =
         compute_health_from_fixed_accounts(&account, HealthType::Init, &ctx.remaining_accounts)?;
     msg!("health: {}", health);
-    require!(health >= 0, MangoError::SomeError);
+    require!(health >= 0, MangoError::HealthMustBePositive);
 
     //
     // Deactivate the position only after the health check because the user passed in