This £240 million deal comprises of a blended pool of mainstream, buy-to-let and self-certification products.
Craig Beresford, director of asset sales at GMAC-RFC, said: "We are delighted to be growing our business relationship with the Dunfermline Building Society. Transactions such as these show the importance of building strong and lasting relationships with repeat buyers."
"GMAC-RFC has spent much time and effort building its reputation as the leading creator and trader of mortgage assets, and we are very much looking forward to continuing our success in this market throughout 2006 and beyond."
Peter Weanie, general manager commercial lending at Dunfermline Building Society commented: "We are delighted to complete a further substantial deal with GMAC-RFC. This purchase represents another significant step in our strategy of continued growth. As Scotland’s leading building society we are always looking to enhance the quality of our assets and our customer base in a controlled and cost effective manner."