EXHIBIT 13.1

Certification

Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

(Subsections (a) and (b) of Section 1350, Chapter 63 of Title 18, United States Code)

Pursuant to section 906 of the Sarbanes-Oxley Act of 2002 (subsections (a) and (b) of section 1350, chapter 63 of title 18, United States Code), each of the undersigned officers of Celulosa Arauco y Constitución S.A. (the “Company”), does hereby certify, to such officer’s knowledge, that:

The Annual Report on Form 20-F for the year ended December 31, 2018 of the Company fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934 and information contained in the Form 20-F fairly presents, in all material respects, the financial condition, results of operations and cash flows of the Company.

Date: April 17, 2019

/s/ Matías Domeyko

Name:  Matías Domeyko

Title:    Chief Executive Officer

Date: April 17, 2019

/s/ Robinson Tajmuch

Name:  Robinson Tajmuch

Title:    Senior Vice-President Comptroller