diff --git a/libs/positions/src/lib/positions-manager.spec.tsx b/libs/positions/src/lib/positions-manager.spec.tsx
new file mode 100644
index 000000000..2f02b6f8b
--- /dev/null
+++ b/libs/positions/src/lib/positions-manager.spec.tsx
@@ -0,0 +1,39 @@
+import { render, screen, fireEvent } from '@testing-library/react';
+import { PositionsManager } from './positions-manager';
+import { positionsMarketsProvider } from './positions-data-providers';
+import { singleRow } from './positions.mock';
+import { MockedProvider } from '@apollo/client/testing';
+import { MAXGOINT64 } from '@vegaprotocol/utils';
+
+const mockCreate = jest.fn();
+jest.mock('@vegaprotocol/wallet', () => ({
+  ...jest.requireActual('@vegaprotocol/wallet'),
+  useVegaWallet: jest.fn(() => ({ pubKey: 'partyId' })),
+  useVegaTransactionStore: jest.fn(() => mockCreate),
+}));
+// eslint-disable-next-line  @typescript-eslint/no-explicit-any
+const mockUseDataProvider = (args: any) => {
+  if (args.dataProvider === positionsMarketsProvider) {
+    return { data: ['market-1', 'market-2'] };
+  }
+  return { data: [singleRow] };
+};
+jest.mock('@vegaprotocol/data-provider', () => ({
+  ...jest.requireActual('@vegaprotocol/data-provider'),
+  useDataProvider: jest.fn((args) => mockUseDataProvider(args)),
+}));
+
+describe('PositionsManager', () => {
+  it('should close position with max uint64', async () => {
+    render(<PositionsManager partyIds={['partyId']} isReadOnly={false} />, {
+      wrapper: MockedProvider,
+    });
+    expect(await screen.getByTestId('close-position')).toBeInTheDocument();
+
+    fireEvent.click(screen.getByTestId('close-position'));
+
+    expect(
+      mockCreate.mock.lastCall[0].batchMarketInstructions.submissions[0].size
+    ).toEqual(MAXGOINT64);
+  });
+});
diff --git a/libs/positions/src/lib/positions-manager.tsx b/libs/positions/src/lib/positions-manager.tsx
index 521ae1b45..98bf332cc 100644
--- a/libs/positions/src/lib/positions-manager.tsx
+++ b/libs/positions/src/lib/positions-manager.tsx
@@ -1,7 +1,7 @@
 import { useCallback } from 'react';
 import { PositionsTable } from './positions-table';
 import * as Schema from '@vegaprotocol/types';
-import { useVegaTransactionStore } from '@vegaprotocol/wallet';
+import { useVegaTransactionStore, useVegaWallet } from '@vegaprotocol/wallet';
 import { t } from '@vegaprotocol/i18n';
 import { useDataProvider } from '@vegaprotocol/data-provider';
 import {
@@ -9,7 +9,7 @@ import {
   positionsMarketsProvider,
 } from './positions-data-providers';
 import type { useDataGridEvents } from '@vegaprotocol/datagrid';
-import { useVegaWallet } from '@vegaprotocol/wallet';
+import { MAXGOINT64 } from '@vegaprotocol/utils';
 
 interface PositionsManagerProps {
   partyIds: string[];
@@ -46,7 +46,7 @@ export const PositionsManager = ({
               side: openVolume.startsWith('-')
                 ? Schema.Side.SIDE_BUY
                 : Schema.Side.SIDE_SELL,
-              size: openVolume.replace('-', ''),
+              size: MAXGOINT64, // improvement for avoiding leftovers filled in the meantime when close request has been sent
               reduceOnly: true,
             },
           ],
diff --git a/libs/positions/src/lib/positions-table.spec.tsx b/libs/positions/src/lib/positions-table.spec.tsx
index ed2aebf4c..ec6e619bc 100644
--- a/libs/positions/src/lib/positions-table.spec.tsx
+++ b/libs/positions/src/lib/positions-table.spec.tsx
@@ -6,6 +6,7 @@ import * as Schema from '@vegaprotocol/types';
 import { PositionStatus } from '@vegaprotocol/types';
 import type { ICellRendererParams } from 'ag-grid-community';
 import { addDecimalsFormatNumber } from '@vegaprotocol/utils';
+import { singleRow } from './positions.mock';
 
 jest.mock('./liquidation-price', () => ({
   LiquidationPrice: () => (
@@ -13,33 +14,6 @@ jest.mock('./liquidation-price', () => ({
   ),
 }));
 
-const singleRow: Position = {
-  partyId: 'partyId',
-  assetId: 'asset-id',
-  assetSymbol: 'BTC',
-  averageEntryPrice: '133',
-  currentLeverage: 1.1,
-  assetDecimals: 2, // this is settlementAsset.decimals
-  quantum: '0.1',
-  lossSocializationAmount: '0',
-  marginAccountBalance: '12345600',
-  marketDecimalPlaces: 1,
-  marketId: 'string',
-  marketCode: 'ETHBTC.QM21',
-  marketTradingMode: Schema.MarketTradingMode.TRADING_MODE_CONTINUOUS,
-  marketState: Schema.MarketState.STATE_ACTIVE,
-  markPrice: '123',
-  notional: '12300',
-  openVolume: '100',
-  positionDecimalPlaces: 0,
-  realisedPNL: '123',
-  status: PositionStatus.POSITION_STATUS_UNSPECIFIED,
-  totalBalance: '123456',
-  unrealisedPNL: '456',
-  updatedAt: '2022-07-27T15:02:58.400Z',
-  productType: 'Future',
-};
-
 describe('Positions', () => {
   const renderComponent = async (rowData: Position) => {
     await act(async () => {
diff --git a/libs/positions/src/lib/positions.mock.ts b/libs/positions/src/lib/positions.mock.ts
index 635eda23d..5d906402b 100644
--- a/libs/positions/src/lib/positions.mock.ts
+++ b/libs/positions/src/lib/positions.mock.ts
@@ -10,6 +10,8 @@ import type {
   MarginsQuery,
   MarginFieldsFragment,
 } from '@vegaprotocol/accounts';
+import type { Position } from './positions-data-providers';
+import * as Schema from '@vegaprotocol/types';
 
 export const positionsQuery = (
   override?: PartialDeep<PositionsQuery>
@@ -168,3 +170,30 @@ const marginsFields: MarginFieldsFragment[] = [
     },
   },
 ];
+
+export const singleRow: Position = {
+  partyId: 'partyId',
+  assetId: 'asset-id',
+  assetSymbol: 'BTC',
+  averageEntryPrice: '133',
+  currentLeverage: 1.1,
+  assetDecimals: 2, // this is settlementAsset.decimals
+  quantum: '0.1',
+  lossSocializationAmount: '0',
+  marginAccountBalance: '12345600',
+  marketDecimalPlaces: 1,
+  marketId: 'string',
+  marketCode: 'ETHBTC.QM21',
+  marketTradingMode: Schema.MarketTradingMode.TRADING_MODE_CONTINUOUS,
+  marketState: Schema.MarketState.STATE_ACTIVE,
+  markPrice: '123',
+  notional: '12300',
+  openVolume: '100',
+  positionDecimalPlaces: 0,
+  realisedPNL: '123',
+  status: PositionStatus.POSITION_STATUS_UNSPECIFIED,
+  totalBalance: '123456',
+  unrealisedPNL: '456',
+  updatedAt: '2022-07-27T15:02:58.400Z',
+  productType: 'Future',
+};
diff --git a/libs/utils/src/index.ts b/libs/utils/src/index.ts
index d1e76477f..7babb85f6 100644
--- a/libs/utils/src/index.ts
+++ b/libs/utils/src/index.ts
@@ -15,3 +15,4 @@ export * from './lib/time';
 export * from './lib/validate';
 export * from './lib/resolve-network-name';
 export * from './lib/is-test-env';
+export * from './lib/constants';
diff --git a/libs/utils/src/lib/constants.ts b/libs/utils/src/lib/constants.ts
new file mode 100644
index 000000000..718b3e46f
--- /dev/null
+++ b/libs/utils/src/lib/constants.ts
@@ -0,0 +1 @@
+export const MAXGOINT64 = '9223372036854775807';