It is possible. For a non-custodial parent to claim a child as a dependent Federal law requires that they obtain a Form 8332 from the custodial parent. See my Legal Guide "Claiming your Children as Dependents" on this site under my name.
Any individual seeking legal advice for their own situation should retain their own legal counsel as this response provides information that is general in nature and not specific to any person's unique situation. Circular 230 Disclaimer - Advice given in this response cannot be used to eliminate penalties with the IRS or any other governmental agency.
Mr. Lively has the more accurate answer. For more details you can go to my legal guide entitled Divorced or Separated Parents Determination of Dependency Exemption,
http://www.avvo.com/legal-guides/ugc/divorced-or-separated-parents-determination-of-dependency-exemption for more details.
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Mr. Fromm is licensed to practice law in PA with offices in Philadelphia and Montgomery Counties. He can be reached at 215-735-2336 or at the email address listed below. He has received a 9.7 rating from AVVO and recently was featured as a 5Star Wealth Manager in the Philadelphia Magazine, November 2009 issue on page 123.
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