What Is an Option Assignment Notice?

An option assignment notice is the formal notification from your broker that you've been assigned on a short options position. When you sell an option contract and that option is exercised by the buyer, your broker informs you through an assignment notice that the transaction has been executed and you must fulfill your obligation. Understanding assignment notices is critical because they trigger immediate cash or share requirements and can significantly affect your portfolio.

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An option assignment notice is the official document your broker sends when someone exercises an option contract you sold. The notice arrives after the exercise occurs and informs you of the number of shares involved, the exercise price, and the settlement date. Most modern brokers deliver these notices electronically through your account dashboard within hours of the exercise, though some situations may require email notifications. Knowing how to interpret and respond to an assignment notice helps you manage your capital requirements and avoid unexpected margin calls or settlement violations.

Quick definition: An option assignment notice is a broker notification stating that a short options position has been exercised, requiring you to either deliver shares (short calls) or purchase shares (short puts) at the contract's strike price by the settlement date.

Key takeaways

• Assignment notices arrive within hours of exercise and are legally binding instructions to settle your obligation
• The notice specifies the number of shares, strike price, and settlement deadline—typically T+2 (two business days later)
• Short call assignments require you to deliver 100 shares per contract at the strike price
• Short put assignments require you to purchase 100 shares per contract at the strike price
• Electronic delivery through your broker's platform is the standard; email and paper notices are backup methods
• Failure to fulfill assignment obligations results in forced liquidation, fines, and account restrictions

What Happens When You Receive an Assignment Notice

When your broker sends you an assignment notice, it means the option buyer has exercised their right to convert the contract into shares. This isn't optional—assignment is mandatory and creates immediate obligations. For a short call assignment, you must deliver 100 shares per contract at the strike price. For a short put assignment, you must purchase 100 shares per contract at the strike price.

The assignment typically becomes known on the morning after the exercise, though the exercise itself happens after market close on the exercise date. Your broker will have confirmed the assignment by processing it through the Options Clearing Corporation (OCC), the clearinghouse that guarantees all options contracts in the United States.

Example: You sold 5 call contracts against Apple stock with a $180 strike price. The next morning, you receive an assignment notice stating that all 5 contracts were exercised. You now have an obligation to deliver 500 Apple shares at $180 per share by T+2 (two business days), regardless of Apple's current market price.

The Timing of Assignment Notices

Assignment notices follow a strict timeline governed by exchange and OCC rules. The exercise must be reported by 5:30 PM Eastern Time on the expiration date or the date the option is exercised. Your broker then processes this information overnight and notifies you by the next morning, typically before the market opens.

Settlement happens T+2, meaning if you're assigned on Thursday morning, your settlement obligation must be complete by Monday afternoon. This two-day window gives you time to gather cash or arrange share delivery if you don't have sufficient positions already.

For index options and some European-style options, the mechanics differ slightly. Index options typically use cash settlement, so you won't receive a physical assignment notice but rather a cash debit or credit to your account.

How Your Broker Delivers the Assignment Notice

Modern brokers deliver assignment notices through multiple channels:

Electronic Dashboard: Your primary notification method. Open your broker's trading platform and navigate to your Activity or History section. The assignment notice appears as a corporate action or options exercise event, showing the exact number of contracts assigned, strike price, and settlement date.

Email Notification: Most brokers send an automatic email within hours of assignment confirming the corporate action and providing details you can save for your records.

Account Statement: The assignment will appear on your next monthly statement with full accounting for the transaction.

Broker Hotline: If you miss the electronic notification, you can call your broker's operations desk and they'll provide verbal confirmation and details.

The key advantage of electronic notifications is that they appear immediately, giving you maximum time to prepare. A trader assigned on Thursday morning can spend all Thursday and Friday morning arranging the necessary shares or cash to settle by Monday.

Assignment Notice Components You'll See

Every assignment notice contains specific information:

Ticker Symbol: The underlying security (e.g., AAPL for Apple)

Exercise/Strike Price: The price at which the option was exercised (e.g., $180)

Number of Shares: 100 times the number of contracts assigned (e.g., 500 shares from 5 contracts)

Assignment Date: The date the exercise was processed (typically the day after expiration)

Settlement Date: The deadline to deliver shares or receive them (T+2 from assignment)

Action Required: Clear statement of whether you must deliver shares (call assignment) or purchase shares (put assignment)

Numeric Example: Your assignment notice reads: "TSLA CALL EXERCISE: 3 contracts at strike $250.00 = 300 shares deliverable. Assignment date: 5/16/2026. Settlement date: 5/18/2026."

Understanding Your Obligations Post-Assignment

Once you receive an assignment notice, you have a legal obligation to settle. For short calls, you must locate shares to deliver. For short puts, you must have sufficient cash to purchase shares at the strike price. Brokers typically enforce these obligations by either liquidating other positions to raise the necessary funds or, in cases of insufficient resources, freezing your account pending settlement.

This is where margin requirements come into play. If you don't have the shares (for call assignment) or cash (for put assignment), your broker will borrow against your other positions. If you lack sufficient margin, your broker will force-liquidate positions to meet the requirement.

Real-world examples

Example 1: Short Call Assignment You sold 2 call contracts on Microsoft at $320 strike. Thursday morning you receive an assignment notice for 200 shares due Friday (T+1 settlement in this case due to early exercise). You own 100 Microsoft shares in your account. Your broker automatically delivers the 100 shares you own and borrows/buys 100 additional shares from the market to complete the 200-share delivery. Your account is debited $32,000 (200 shares × $320) and credited the value of your delivered shares.

Example 2: Short Put Assignment You sold 4 put contracts on Amazon at $150 strike. Friday morning you receive an assignment notice for 400 shares due Monday. You have $60,000 in cash. Your broker uses $60,000 of your cash to purchase 400 shares at the strike price, reducing your cash balance and adding 400 Amazon shares to your position. If you had insufficient cash, the broker would liquidate other positions to fund the purchase.

Example 3: Multiple Assignments You sold both calls and puts on the same stock in the same week and both were exercised. You receive two separate assignment notices, one for call delivery and one for put purchase. Your broker coordinates these settlements, and depending on whether they net out, you may have a reduced obligation or even receive shares.

Why Brokers Send Notices Multiple Ways

The redundancy in notification methods (dashboard, email, statement) exists because assignment obligations are serious. The SEC and FINRA require brokers to ensure clients receive clear notice. Missing an assignment notice due to broker error can result in regulatory fines and client compensation, so brokers over-communicate to protect themselves legally.

Common mistakes

Mistake 1: Ignoring Overnight Emails Many traders don't check email until mid-morning and miss the assignment notice window. By then, they've made other trades assuming no assignment occurred, leading to overdraft situations. Best practice: check your assignment email immediately when you wake up, or enable push notifications on your broker's mobile app.

Mistake 2: Confusing Exercise Notices with Expiration An assignment notice doesn't mean your option contract simply expired worthless—it means the buyer chose to exercise, converting it to shares. Some traders incorrectly assume the notice is informational and fail to act, resulting in forced liquidations.

Mistake 3: Assuming You Have Time While settlement is T+2, your broker's margin calculation can flag the obligation immediately. If you lack sufficient resources, your account can be restricted within hours. Don't assume you have Monday morning to decide—treat Friday's assignment notice as an obligation due Sunday night.

Mistake 4: Forgetting About Tax Implications An assignment triggers a taxable event immediately. You're deemed to have sold (short call) or purchased (short put) at the strike price, not the market price. Many traders are surprised by unexpected tax liability and don't properly document the transaction.

Mistake 5: Not Tracking Multiple Assignments Traders who have sold numerous contracts may miss that some were assigned while others expired worthless. Failure to track which specific contracts were assigned leads to margin miscalculations and account violations.

FAQ

When exactly do I find out I've been assigned?

Most assignments are known by 9:30 AM ET the morning after the exercise date. Some brokers notify as early as 6:00 AM; others may wait until 10:00 AM. Check your account dashboard immediately upon market open rather than waiting for email.

Can I refuse an assignment notice?

No. Assignment is mandatory and non-negotiable. Once the buyer exercises the option, the transaction is binding and cleared through the OCC. Your only choice is how to fulfill the obligation (e.g., selling shares you own versus buying them in the open market).

What if I don't have shares to deliver or cash to purchase?

Your broker will automatically take action: for calls, they'll buy shares in the market to deliver; for puts, they'll liquidate positions to raise cash. This forced action can result in slippage, forced-sell losses, and margin call fees.

Do assignment notices expire or expire after a certain time?

No—assignment notices represent actual obligations that must be settled. The settlement deadline is fixed at T+2, and failure to settle results in settlement failures, forced liquidations, and potential account restrictions.

Why do some options get assigned early and others don't?

The option buyer controls exercise timing. They'll exercise when it's economically beneficial—usually for calls when the stock has risen significantly above the strike, or for puts when the stock has fallen below the strike and holds dividend or extrinsic value. The notice itself doesn't explain why; you just know it happened.

If I sell an option and it expires worthless, do I get an assignment notice?

No. Worthless options expire without any action or notice. You receive an assignment notice only if the buyer actively exercises the contract before or at expiration.

Can assignment notices be delayed?

Rarely. OCC rules mandate processing overnight, and brokers are required to notify by market open. Delays can occur during system outages or when brokers have processing backlogs, but these are exceptions. If you haven't received notice by 10:00 AM ET, contact your broker.

Related concepts

• The Mechanics of Assignment
• ITM at Expiration Means Assignment
• What Is Assignment
• Why Early Exercise Happens

Summary

An option assignment notice is your broker's formal notification that a short options position has been exercised and must be settled. These notices arrive electronically within hours of the exercise and specify exact obligations: share delivery for calls, share purchase for puts. Understanding the timing, components, and settlement deadline of assignment notices is essential for managing margin requirements and avoiding costly forced liquidations. Treat every assignment notice as an immediate obligation due within two business days, regardless of market conditions.

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