This excerpt taken from the PBI DEF 14A filed Apr 3, 2007.
Proposal 4. Broker non-votes would have the effect of a vote against the amendment.
How do Dividend Reinvestment Plan participants or employees with shares in the 401(k) plan vote by proxy?
If you are a stockholder of record and participate in the companys Dividend Reinvestment Plan, or employee 401(k) plan, you will receive a proxy card with instructions on the three different ways available to you to grant your proxy (through the mail, by telephone, or over the Internet).
Shares held in the companys 401(k) plan are voted by the plan trustee in accordance with voting instructions received from plan participants using the enclosed proxy card. The plan directs the trustee to vote shares for which no instructions are received in the same proportion (for, against, abstain or withheld) indicated by the voting instructions given by participants in the plan.