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Form 145, Assignment of Agreement of Purchase and Sale, page 1
Complex · 70/100Form Complexity Index

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What this form asks for

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OREA Form 145 is a legal document used in Ontario real estate for an original buyer (the assignor) to transfer their rights and obligations under an existing Agreement of Purchase and Sale to a new buyer (the assignee). This is common in pre-construction condo sales, allowing the original purchaser to sell their contract before the building is complete. Today, this form can be filled out quickly and accurately using AI-powered services like Instafill.ai, which can also convert non-fillable PDF versions into interactive fillable forms.
Fillable fields107
Pages6
Sections44
Tables and lists7
Questions that depend on earlier answers11
Form Complexity IndexComplex, 70/100

The AI checks your answers before you download

14 checks built for this form, so a wrong date or a missing answer is caught before anyone else sees it.

Irrevocability Date Must Be in the Future

This check ensures that the date and time entered in the 'IRREVOCABILITY' clause are set in the future relative to the time of form submission. An offer cannot be irrevocable until a past date. If this validation fails, it indicates a data entry error that would render the offer's time limit invalid, and the user must correct the date and time to proceed.

Ensures Full Legal Names for Assignor and Assignee

This validation verifies that the 'Assignor' and 'Assignee' fields are not empty. These fields require the full legal names of all parties, as they are fundamental to creating a legally binding contract. Failure to provide these names makes the agreement unenforceable as the parties to the contract are not clearly identified.

Schedule B Financial Calculation Accuracy (Total Price)

This check validates the logical consistency of the financial figures on Schedule B. It ensures that the 'Total Purchase Price' (Item 1) is equal to the sum of the 'Purchase Price of original Agreement of Purchase and Sale' (Item 2) and the 'Payment by Assignee to Assignor for this Assignment Agreement' (Item 4). This is critical for ensuring the financial summary is accurate and prevents miscalculations that could lead to disputes at closing.

Schedule B Financial Calculation Accuracy (Assignment Payment)

This validation confirms the breakdown of the assignment payment on Schedule B. It checks that the 'Payment by Assignee to Assignor' (Item 4) equals the sum of the 'Deposit paid under this Assignment Agreement' (Item 5) and the 'Balance of the payment' (Item 6). An incorrect calculation here would create a discrepancy in the flow of funds and complicate the closing process.

Chronological Order of Dates

This validation ensures that the 'Confirmation of Acceptance' date is on or after the main 'Agreement Date' from page 1. An agreement cannot be accepted before it is dated. This maintains the logical timeline of the transaction and prevents inconsistencies that could call the contract's validity into question.

Acceptance Date Within Irrevocability Period

This check verifies that the 'Confirmation of Acceptance' date and time occurs on or before the 'Irrevocability' date and time. An offer cannot be accepted after it has expired and become null and void. This validation is crucial to confirm that the acceptance is valid and a binding agreement has been formed.

And 8 more checks
  • Mandatory Attachment of Schedule C
  • Conditional Deposit Holder Requirement
  • Consistent Party Names Across Schedules
  • Valid Email Address Format
  • HST Clause Selection Requirement
  • Completeness of Required Initials
  • Valid Numeric Format for Monetary Fields
  • Brokerage Contact Information Completeness

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How to Fill Out OREA Form 145 Online for Free in 2026

What the AI walks you through.

  1. Navigate to Instafill.ai and upload or select the OREA Form 145, Assignment of Agreement of Purchase and Sale.
  2. Use the AI assistant to accurately input the full legal names and contact information for the Assignor (original buyer) and the Assignee (new buyer).
  3. Provide the details of the real property as stated in the original Agreement of Purchase and Sale, including the address and legal description.
  4. Enter the financial terms, including the purchase price, deposit amounts, and the specific calculations for the assignment payment as outlined in Schedule B.
  5. Attach all required schedules, particularly Schedule C, which is the complete original Agreement of Purchase and Sale being assigned.
  6. Review all the auto-filled information for accuracy, then use the platform to have the Assignor, Assignee, and witnesses electronically sign the document in the designated sections.
  7. Download, save, and share the completed and executed Form 145 with all parties, including lawyers and brokerages involved in the transaction.

Common Mistakes in Completing OREA Form 145

The ones the AI is built to catch.

Using incomplete or incorrect legal names
People often use nicknames, initials, or omit middle names instead of the 'Full legal names' required for the Assignor and Assignee. This mistake can create significant legal and title transfer problems, as the names on the agreement must match government-issued identification and property records. To avoid this, always use the full legal names as they appear on official documents like a driver's license or passport.
Providing an incomplete property description
Fillers frequently provide only the municipal address and neglect to include the full legal description, frontage, and depth as required. The municipal address is for convenience, but the legal description is what uniquely identifies the property in land registry systems, and its omission can render the contract ambiguous or unenforceable. Ensure you copy the complete legal description from the original Agreement of Purchase and Sale or title documents.
Errors in the financial calculations on Schedule B
Schedule B requires a detailed breakdown of the total purchase price, original price, deposits, and the assignment fee, which can be confusing. Common errors include miscalculating the 'Payment by Assignee to Assignor' (Item 4) or having a total in Item 1 that doesn't match the sum of its parts. These mathematical errors can lead to disputes over funds at closing and require amendments to the agreement.
Ambiguous HST designation
In Section 6, parties must specify whether the Harmonized Sales Tax (HST) is 'included in' or 'in addition to' the purchase price. Leaving this blank or choosing the wrong option creates major financial uncertainty and can lead to unexpected costs amounting to tens of thousands of dollars. This term must be clearly negotiated and accurately recorded to prevent serious financial disputes before closing.
Forgetting to initial all pages
The form requires the Assignor and Assignee to initial the bottom of each page, including all schedules. People often miss one or more pages, which can later be used to argue that the party was not aware of or did not agree to the terms on that specific page. To ensure the entire agreement is binding, methodically initial every single page. AI-powered tools like Instafill.ai can help by highlighting all required initial and signature fields.
Incorrectly defining the irrevocability period
The irrevocability clause (Section 1) requires a precise time, including 'a.m./p.m.', and a date. A common mistake is omitting the 'a.m./p.m.' designation, which makes the offer's expiry time ambiguous by 12 hours and can lead to disputes over whether an acceptance was timely. Always double-check that a specific time, including the a.m./p.m. suffix, and a clear date are entered to create a legally certain deadline.
Failing to attach and reference all schedules
The agreement states that Schedules A, B, and C form part of the contract, with a blank space to list others. Parties may attach additional documents, like a financing condition or an inspection waiver, but forget to explicitly list them on page 1. If not properly referenced, these extra schedules may not be considered a legal part of the agreement, making their terms unenforceable.
Missing witness signatures and dates
For a contract to be legally binding, signatures often need to be witnessed. People frequently forget to have a witness sign and date the document alongside their own signature on Page 4. An unwitnessed signature can be challenged, potentially jeopardizing the validity of the entire agreement. Always ensure a third-party witness is present to sign and date the document at the same time as the Assignor and Assignee.
Inconsistent deposit information
On page 1, the deposit amount is required in both words and numbers, and the 'Deposit Holder' must be named. Discrepancies between the numerical and written amounts are common, creating confusion. Furthermore, failing to clearly identify the Deposit Holder (e.g., the seller's brokerage) can lead to delays and disputes over who is responsible for holding the funds in trust. Using a tool like Instafill.ai can help prevent such data entry errors by ensuring consistency.
Omitting lawyer and contact information
The sections for lawyer details and address for service are critical for official communication, yet are often left incomplete. Missing or incorrect lawyer contact information can severely delay the closing process, as legal representatives cannot communicate efficiently. Since this form is a non-fillable PDF, a tool like Instafill.ai can convert it into an interactive version, making it easier to fill out these crucial contact fields completely and accurately.

Frequently Asked Questions About OREA Form 145

 

Is it really free for 7 days?
Yes. You pay $0 today. Cancel before Nov 5 and you are never charged. Keep it, and it is $19.99 a month for 5 fills of your OREA Form 145.
Can I fill other forms too?
This plan is for your OREA Form 145: your own AI agent fills it as often as 5 times a month. To fill other forms and upload your own, choose a Professional plan from your account.
How do I cancel?
From your account, in two clicks, any time. No email, no call.
How does the AI fill out OREA Form 145?
You answer a few questions in plain words, or upload a document you already have. The AI reads what you give it and puts each answer into the right field of OREA Form 145, on every page, in seconds. It checks the answers against the form's own rules, and you review and change anything before you download, print or sign.
What happens to my information?
It is encrypted in transit and at rest, and it is never used to train AI.
How complex is OREA Form 145 to fill out?
OREA Form 145 has a Form Complexity Index of 70 out of 100, in the complex tier: 107 fillable fields across 6 pages. Instafill.ai's AI fills it in under a minute, with every field there for you to review before you download.
What is OREA Form 145 used for?
Form 145, the Assignment of Agreement of Purchase and Sale, is used in Ontario to legally transfer a buyer's rights and obligations in an existing property purchase agreement to a new buyer before the original sale is finalized.
Who is the 'Assignor' and who is the 'Assignee'?
The 'Assignor' is the original buyer who is selling their contract. The 'Assignee' is the new buyer who is purchasing the contract and taking over the responsibility to complete the purchase from the original property seller.
What documents must be attached to this form?
A complete copy of the original Agreement of Purchase and Sale must be attached as Schedule C. Schedules A and B, which detail the payment calculations, are also required and form part of the agreement.
What is the purpose of Schedule B, 'Calculation of funds'?
Schedule B breaks down the total amount the Assignee must pay. It clarifies the original property price, the deposit paid by the Assignor (which the Assignee repays), and the profit or fee being paid to the Assignor for the assignment.
What happens if the original seller in the purchase agreement doesn't approve this assignment?
If the original seller's consent is required but they refuse to provide it, this Assignment Agreement becomes null and void. The Assignee's deposit will then be returned in full without interest.
Who is responsible if the original seller defaults and the property sale fails?
If the transaction fails due to the original seller's default, the Assignor is not liable for any losses or damages incurred by the Assignee. The assignment agreement becomes void, and all money paid by the Assignee is returned without interest.
What does the 'Irrevocability' clause mean?
This clause sets a specific date and time until which the offer to assign the agreement cannot be revoked by the offering party. If the other party does not accept the offer by this deadline, the offer becomes void.
As the Assignee, what are my obligations after signing?
Upon signing, you agree to assume all of the Assignor's duties, warranties, and obligations as if you were the original buyer in the Agreement of Purchase and Sale. You are legally bound to complete the purchase with the property's seller.
How is the Harmonized Sales Tax (HST) handled in this transaction?
The form requires you to specify whether any applicable HST on the property sale is included in or is in addition to the purchase price. It is important to clarify this to avoid disputes over the final amount payable.
What happens to the deposit I pay with this form?
The deposit is held in a brokerage's non-interest-bearing trust account. It is credited toward the purchase price upon successful completion or returned to you if the agreement is terminated according to its terms.
Do I need a lawyer to complete this form?
While the form doesn't mandate it, the inclusion of sections for lawyer information strongly implies it. Given the complexity and legal implications of assigning a contract, it is highly recommended that both the Assignor and Assignee seek independent legal advice.
Can I use an AI tool to help me fill out Form 145?
Yes, services like Instafill.ai use AI to accurately auto-fill form fields, which can save you time and help reduce errors. This is especially helpful for complex legal forms with many required details.
How can I fill out this form online using Instafill.ai?
Simply upload the Form 145 PDF to the Instafill.ai platform. The service will make the document interactive, allowing you to easily type in your information, and its AI can help auto-fill fields based on your data.
My copy of Form 145 is a non-fillable PDF. What can I do?
You can use a service like Instafill.ai to solve this problem. It can convert flat, non-fillable PDFs into interactive, fillable forms that you can complete, sign, and share electronically.
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