Exhibit 5.1

                            Opinion of Blank Rome LLP

                             [Blank Rome Letterhead]

                                  May 17, 2004

NCO Group, Inc.
507 Prudential Road
Horsham, PA 19044

             Re:   NCO Group, Inc. Form S-8 Registration Statement
                   -----------------------------------------------

Gentlemen:

We have acted as counsel to NCO Group, Inc. (the "Company") in connection with
the Company's Form S-8 Registration Statement (the "Registration Statement")
filed by the Company with the Securities and Exchange Commission pursuant to the
Securities Act of 1933, as amended, relating to the offer and sale of up to
2,000,000 shares of common stock, no par value (the "Common Stock"), by the
Company pursuant to NCO Group, Inc.'s Equity Incentive Plan (the "Plan"). This
opinion is furnished pursuant to the requirements of Item 601(b)(5) of
Regulation S-K.

In rendering this opinion, we have examined only the following documents: (i)
the Company's Amended and Restated Articles of Incorporation and the Company's
Amended and Restated Bylaws (as amended); (ii) resolutions adopted by the Board
of Directors of the Company; (iii) the Registration Statement; and (iv) the
Plan. We have not performed any independent investigation other than the
document examination described. Our opinion is therefore qualified in all
respects by the scope of that document examination. We have assumed and relied,
as to questions of fact and mixed questions of law and fact, on the truth,
completeness, authenticity and due authorization of all certificates, documents,
and records examined and the genuineness of all signatures. In rendering this
opinion we have assumed that 31,338,000 shares of the Company's Common Stock are
outstanding. This opinion is limited to the laws of the Commonwealth of
Pennsylvania.

Based upon and subject to the foregoing, we are of the opinion that the shares
of Common Stock of the Company which are being offered and sold by the Company
pursuant to the Registration Statement and the Plan, when sold in the manner and
for the consideration contemplated by the Registration Statement and the Plan,
if any, will be legally issued, fully paid and non-assessable.

We hereby consent to the filing of this opinion as an Exhibit to the
Registration Statement.



                                                    Sincerely,

                                                    /s/ Blank Rome LLP

                                                    BLANK ROME LLP