We sold our contract last summer. The process was fairly easy - we used First American for our closing company. You need to be aware however, that when you sell, 10% of the purchase price will be withheld and remitted to the IRS. It is then up to you to file a US income tax form in order to get the money back. In order to file a tax form, which we are in the process of doing, we had to obtain a taxpayers number. In order to obtain a taxpayers number we had to send my husbands original passport to the IRS office in Philadelphia in order to prove he was a Canadian citizen. We weren't too happy about sending the passport away, but our only other recourse was to visit an American Consulate here in Canada, which unfortunately is located a great distance from our home, or go the the US and find an IRS office and apply for one there.