SUPPLEMENTAL INDENTURE

Exhibit 4.3

SUPPLEMENTAL INDENTURE

SUPPLEMENTAL INDENTURE, dated as of February 22, 2013, among eDepot, LLC, a Delaware limited liability company (the “Guaranteeing Subsidiary”), a subsidiary of Office Depot, Inc., a Delaware corporation (or its permitted successor) (the “Company”), the Company, the Guarantors listed on the signature pages hereto and U.S. Bank National Association (or its permitted successor), a nationally chartered banking association, as trustee under the Indenture referred to below (the “Trustee”).

W I T N E S S E T H

WHEREAS, the Company and the other Guarantors party thereto have heretofore executed and delivered to the Trustee an indenture (the “Indenture”), dated as March 14, 2012 providing for the issuance of the Company’s 9.75% senior secured notes due 2019 (the “Notes”);

WHEREAS, Section 4.11 of the Indenture provides that under certain circumstances the Company is required to cause the Guaranteeing Subsidiary to execute and deliver to the Trustee a supplemental indenture pursuant to which the Guaranteeing Subsidiary shall, subject to Article Twelve of the Indenture, jointly and severally with all of the other Guarantors, fully and unconditionally guarantee all the Company’s obligations under the Notes pursuant to a Note Guarantee on the terms and conditions set forth herein (the “Note Guarantee”); and

WHEREAS, pursuant to Section 9.01 of the Indenture, the Trustee, the Company and the existing Guarantors are authorized to execute and deliver this Supplemental Indenture;

NOW THEREFORE, in consideration of the foregoing and for other good and valuable consideration, the receipt of which is hereby acknowledged, the Guaranteeing Subsidiary, the Company and the Trustee mutually covenant and agree as follows for the equal and ratable benefit of the Holders of the Notes:

1. Defined Terms. As used in this Supplemental Indenture, terms defined in the Indenture or in the preamble or recital hereto are used herein as therein defined. The words “herein,” “hereof’ and “hereby” and other words of similar import used in this Supplemental Indenture refer to this Supplemental Indenture as a whole and not to any particular section hereof.

2. Agreement to Guarantee. The Guaranteeing Subsidiary hereby agrees, jointly and severally with all other Guarantors, to unconditionally guarantee the Company’s obligations under the Notes on the terms and subject to the conditions set forth in Article Twelve of the Indenture and to be bound by all other applicable provisions of the Indenture.

3. Notices. All notices or other communications to the Guaranteeing Subsidiary shall be given as provided in Section 13.01 of the Indenture.

4. Ratification of Indenture; Supplemental Indentures Part of Indenture. Except as expressly amended hereby, the Indenture is in all respects ratified and confirmed and all the terms, conditions and provisions thereof shall remain in full force and effect. This Supplemental Indenture shall form a part of the Indenture for all purposes, and every Holder of Notes heretofore or hereafter authenticated and delivered shall be bound hereby.

5. GOVERNING LAW. THIS SUPPLEMENTAL INDENTURE SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK, WITHOUT REGARD TO CONFLICTS OF LAWS PRINCIPLES WHICH WOULD HAVE THE EFFECT OF APPLYING THE LAWS OF ANY OTHER JURISDICTION.

6. Trustee Makes No Representation. The Trustee makes no representation as to the validity or sufficiency of this Supplemental Indenture.

7. Counterparts. The parties may sign any number of copies of this Supplemental Indenture. Each signed copy shall be an original, but all of them together represent the same agreement.

8. Effect of Headings. The Section headings herein are for convenience only and shall not affect the construction thereof.

9. Execution and Delivery. The Guaranteeing Subsidiary agrees that the Note Guarantee shall remain in full force and effect notwithstanding any failure to endorse on each Note a notation of the Note Guarantee.

10. No Recourse Against Others. No past, present or future director, officer, employee, manager, incorporator or stockholder of the Guaranteeing Subsidiary, as such, shall have any liability for any obligations of the Guaranteeing Subsidiary under the Notes, the Indenture, this Supplemental Indenture, the Note Guarantees, or Security Documents for any claim based on, in respect of, or by reason of, such obligations or their creation. The waiver and release under this Section 10 are part of the consideration for the Note Guarantees.

IN WITNESS WHEREOF, the parties hereto have caused this Supplemental Indenture to be duly executed as of the date first above written.