"Addendum to a Contract"

What Is an Addendum to a Contract?

A Contract Addendum is a supplemental document that is not included in the original contract. Generally, it is completed, signed, and executed after the original contract to add certain terms and conditions, obligations, or details. You may choose to adjust a date, change a specific condition that is not working for either party, or agree on a deadline extension.

Despite changing certain clauses and definitions in the original agreement, an Addendum leaves other provisions in full force. If you require a Contract Addendum template, you may download it below or draft a more personalized document using our online form builder.

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How to Write an Addendum to a Contract?

Follow these steps to create an Addendum to a Contract:

  1. List the parties to the original agreement in the beginning section. Refer to the original contract. Do not forget to indicate the date at which the addendum comes into effect.
  2. State all the terms and sections of the original contract the addendum alters. Write something like, "The Agreement shall be modified as follows," and put the old and new provisions side by side to clearly see the differences. It is also possible to use bold styles and strikethroughs to underline the removed and added parts - just do not forget to specify what each style means.
  3. When adding an Addendum to a contract, make sure it looks just like the original document. Use the same font size and margins, and do not forget to title this document "Addendum to _____ (name of the contract and its date)."
  4. Be thorough, concise, and clear in your writing. Once the addendum is ready, add signature lines at the end so that potential new parties may sign it. All parties must be present to sign the addendum or appoint representatives who can sign on their behalf. Once the addendum is prepared, it becomes a part of the original contract, and a new party has the same rights and responsibilities as the original signers. The addendum must be attached to the original agreement, and each party receives a copy.

How Do you Word Adding Someone to a Contract on an Addendum?

Addendums often add parties to the agreement because the identities of those parties cannot be determined at the time the original contract is signed. Joinders are widely used to expand and clarify partnership agreements, stockholders' agreements, tenancy agreements, etc. The original contract must include a clause stating that new parties to the agreement must be explicitly named in the addendum. When composing an Addendum, write something like "Michael Jones hereby accepts all legal obligations under the Original Contract" and "All parties hereby agree to the additional terms and conditions of the original contract."


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Addendum to a Contract
This ​ A ddendum to a Contract (hereinafter referred to as the “Addendum”) is entered
into as of _________________ by and between ______________________________,
with a mailing address of ________________________________________________
_________________________ (hereinafter referred to as the “_________________”)
and ______________________________, with a mailing address of _____________
_____________________________________________________________________
(hereinafter referred to as the “_________________”), collectively referred to as the
“Parties”, both of whom agree to be bound both by this Addendum and the Contract
that it pertains to.
Addendum Conditions​ . This Addendum is by and between the Parties with regard to
the __________________________________________________________________.
This Addendum shall amend a prior Contract titled ____________________________
entered into as of ____________________, a copy of which is attached. This is the
__________ amendment to the original Сontract. Through this Addendum, the Parties
wish to bring forth the following changes to the existing Contract:
_____________________________________________________________________
_____________________________________________________________________
_____________________________________________________________________
_____________________________________________________________________
Below are the amended clauses:
1. _______________________________________________________________
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
2. _______________________________________________________________
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
Addendum to a Contract
This ​ A ddendum to a Contract (hereinafter referred to as the “Addendum”) is entered
into as of _________________ by and between ______________________________,
with a mailing address of ________________________________________________
_________________________ (hereinafter referred to as the “_________________”)
and ______________________________, with a mailing address of _____________
_____________________________________________________________________
(hereinafter referred to as the “_________________”), collectively referred to as the
“Parties”, both of whom agree to be bound both by this Addendum and the Contract
that it pertains to.
Addendum Conditions​ . This Addendum is by and between the Parties with regard to
the __________________________________________________________________.
This Addendum shall amend a prior Contract titled ____________________________
entered into as of ____________________, a copy of which is attached. This is the
__________ amendment to the original Сontract. Through this Addendum, the Parties
wish to bring forth the following changes to the existing Contract:
_____________________________________________________________________
_____________________________________________________________________
_____________________________________________________________________
_____________________________________________________________________
Below are the amended clauses:
1. _______________________________________________________________
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
2. _______________________________________________________________
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
3. _______________________________________________________________
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
4. _______________________________________________________________
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
5. _______________________________________________________________
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
This Addendum may be amended by mutual consent of both Parties. This Addendum
may be altered or amended only by a subsequent agreement executed in writing by the
Parties. This Addendum shall be constructed in accordance with and governed by the
laws of the State of ______________________.
This Addendum shall be binding upon the parties hereto, including their heirs,
successors, assigns, executors, and personal representatives. If any term, condition, or
other provision of this Addendum is found to be invalid or incapable of being
enforced by any court of competent jurisdiction, all other terms, conditions, and
provisions of this Addendum shall nevertheless remain in full force and effect.
The Parties agree to the terms and conditions set forth above as demonstrated by their
signatures as follows:
____________________________
____________________________
Name: ______________________
Name: ______________________
Signed: _____________________
Signed: _____________________
Date: _______________________
Date: _______________________
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