NOTATION OF SENIOR SUBORDINATED GUARANTEE

Exhibit 4.16

NOTATION OF SENIOR SUBORDINATED GUARANTEE

For value received, each Guarantor (which term includes any successor Person under the Indenture) has, jointly and severally, unconditionally guaranteed, to the extent set forth in and subject to the provisions in the Indenture dated as of November 15, 2006 (the “Indenture”) among Collect Acquisition Corp., a corporation organized under the laws of the State of Pennsylvania, the guarantors named on the signature pages thereof, and The Bank of New York, a New York banking corporation, as trustee (the “Trustee”), (a) prompt payment of the principal of, premium, if any, and accrued and unpaid interest and defaulted interest, if any, on the Notes (as defined in the Indenture) when due, whether at maturity, by acceleration, redemption or otherwise, and the prompt payment of interest on overdue principal, premium, if any, and interest and defaulted interest, if any, on the Notes (pursuant to Section 2.12 of the Indenture), if lawful (subject in all cases to any applicable grace periods provided in the Indenture and the Notes) when due, and all other obligations of the Company to the Holders or the Trustee under the Indenture and the Notes will be promptly paid in full, all in accordance with the terms of the Indenture and the Notes and (b) in case of any extension of time of payment or renewal of any Notes or any of such other obligations, the same will be promptly paid in full when due in accordance with the terms of the extension or renewal, whether at stated maturity, by acceleration or otherwise. The obligations of the Guarantors to the Holders of Notes and to the Trustee pursuant to the Note Guarantee and the Indenture are expressly set forth in Article Eleven of the Indenture and reference is hereby made to the Indenture for the precise terms of the Note Guarantee. Each Holder of a Note, by accepting the same, agrees to and shall be bound by such provisions.

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IN WITNESS HEREOF, each Guarantor has caused this Notation of Guarantee to be signed manually or by facsimile by its duly authorized officer.