WAUSAU PAPER CORP. 2008 SUPPLEMENTAL RETIREMENT PLAN PARTICIPATION CERTIFICATE

Exhibit 10.3

WAUSAU PAPER CORP.

2008 SUPPLEMENTAL RETIREMENT PLAN

PARTICIPATION CERTIFICATE

Name of Participant:

___________________________________

Title:

___________________________________

The following terms and conditions to vesting and benefit accrual are applicable to the above-named Participant’s participation in the Wausau Paper Corp. 2008 Supplemental Retirement Plan (the “Plan”).

1.

Participation Date.  Participation in the Plan shall begin on ____________________.

2.

Normal Retirement Age.   The Participant must attain age __________ and complete ____ years of Continuous Service as an Active Participant in order to attain his Normal Retirement Age (in accordance with Section 2.1(i) of the Plan).  

3.

Early Retirement Age.  

£

The Participant must attain age __