**Exhibit 4.20**

EXECUTION VERSION 

FOURTH SUPPLEMENTAL INDENTURE 

dated as of March 8, 2013 

to the 

INDENTURE 

dated as of December 3, 2009 

among 

CASCADES INC., 

as the Company, 

THE SUBSIDIARY GUARANTORS named therein, and 

COMPUTERSHARE TRUST COMPANY 

OF CANADA, 

as Trustee, 

asamended 

FOURTH SUPPLEMENTAL INDENTURE (this “*Fourth Supplemental Indenture*”), datedas of March 8, 2013, among CASCADES INC. (the “*Company*”), Cascades Transport Cabano Inc. (the “*New Subsidiary Guarantor*”) and COMPUTERSHARE TRUST COMPANY OF CANADA, as trustee under the Indenture referred tobelow (the “*Trustee*”). 

W I T N E S S E T H : 

WHEREAS, the Company has heretofore executed and delivered to the Trustee an indenture, dated as of December 3,2009 (the “*Indenture*”), providing for the issuance of the Company’s 7 3/4% Senior Notes due 2016 (the “*Notes*”); 

WHEREAS, the Company has issued and outstanding C$200,000,000 of Notes under the Indenture; 

WHEREAS, Section 4.17 of the Indenture provides that the Company shall cause each person that becomes its Canadian or U.S.Restricted Subsidiary to execute and deliver to the Trustee a Subsidiary Guarantee as soon as practicable after such time such person becomes a Canadian or U.S. Restricted Subsidiary; 

WHEREAS, the New Subsidiary Guarantor is a Canadian Subsidiary of the Company; 

WHEREAS, Section 9.01 of the Indenture provides that the Company and the Trustee may amend or supplement the Indenture without theconsent of any Holder of a Note to add additional Subsidiary Guarantees with respect to the Notes as provided or permitted under the Indenture; and 

WHEREAS, pursuant to Sections 4.17, 9.01 and 9.06 of the Indenture, the Trustee, the Company and the New Subsidiary Guarantor are authorized to execute and deliver this Fourth Supplemental Indenture;

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

1. Definitions. (a) Capitalized terms used herein without definition shall have the meanings assigned to them in theIndenture. 

(b) For all purposes of this Fourth Supplemental Indenture, except as otherwise herein expressly provided orunless the context otherwise requires: (i) the terms and expressions used herein shall have the same meanings as corresponding terms and expressions used in the Indenture; and (ii) the words “herein,” “hereof” and“hereby” and other words of similar import used in this Fourth Supplemental Indenture refer to this Fourth Supplemental Indenture as a whole and not to any particular section hereof. 

 
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2. Agreement to Guarantee. The New Subsidiary Guarantor hereby agrees, jointly andseverally with the existing Subsidiary Guarantors, to guarantee the Company’s obligations under the Notes on the terms and subject to the conditions set forth in Article 10 of the Indenture and to be bound by all other applicable provisions ofthe Indenture. From and after the date hereof, the New Subsidiary Guarantor shall be Subsidiary Guarantor for all purposes under the Indenture and the Notes. 

3. Ratification of Indenture; Fourth Supplemental Indenture 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 Fourth Supplemental Indenture shall form a part of the Indenture for all purposes, and every Holder of Notes heretofore or hereafter authenticated and delivered shall bebound hereby. 

4. Miscellaneous. 

4.1 Governing Law. THIS FOURTH SUPPLEMENTAL INDENTURE SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE PROVINCE OF QUEBEC AND THE FEDERAL LAWS OF CANADA APPLICABLE THEREINAND WILL BE TREATED IN ALL RESPECTS AS QUEBEC CONTRACTS. 

4.2 Trustee Makes No Representation. The Trustee makes norepresentation as to the validity or sufficiency of this Fourth Supplemental Indenture, or for or in respect of the recitals contained herein. 

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

4.4 Effect of Headings. The Article and Section headings herein are for convenience only and shall not affect theconstruction thereof. 

4.5 Conflict with TIA. If any provision of this Fourth Supplemental Indenture limits, qualifiesor conflicts with any provision of the TIA, that is required under the TIA to be part of and govern any provision of this Fourth Supplemental Indenture, the provision of the TIA shall control. If any provision of this Fourth Supplemental Indenturemodifies or excludes any provision of the TIA that may be so modified or excluded, the provisions of the TIA shall be deemed to apply to the Indenture as so modified or to be excluded by this Fourth Supplemental Indenture, as the case may be.

4.6 Severability. In case any provision of this Fourth Supplemental Indenture shall be invalid, illegal orunenforceable, the validity, legality and enforceability of the remaining provisions shall not in any way be affected or impaired thereby. 

4.7 No Third Party Beneficiaries. Nothing in this Fourth Supplemental Indenture, the Indenture, or the Notes, express or implied, shall give to any Person, other than the parties hereto and theretoand their successors hereunder and thereunder, and the Holders of the Notes, any benefit of any legal or equitable right, remedy or claim under the Indenture, this Fourth Supplemental Indenture or the Notes. 

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EXECUTION VERSION 

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

 
Company:CASCADES INC.By: 
/s/ Robert F. Hall
 Name: Robert F. Hall Title: Vice President, Legal Affairs and Corporate SecretaryNew Subsidiary Guarantor:CASCADES TRANSPORT CABANO INC.By: 
/s/ Robert F. Hall
 Name: Robert F. Hall Title: Assistant Secretary
Trustee:COMPUTERSHARE TRUST COMPANY OF CANADABy: 
/s/ Fabienne Pinatel
 Name: Fabienne Pinatel Title: Corporate Trust Officer
 
By: 
/s/ Ekaterini Galouzis
 Name: Ekaterini Galouzis Title: Gestionnaire Fiduciaire Adjointe – Associate Trust Officer