How does a non-profit organization purchase property?

A not for profit can purchase real or personal property related to its charitable purpose. Remember, however, that the not for profit will ultimately have to give all its property to charitable purposes or to another not for profit in the event of dissolution or liquidation.

You have asked a simple question for which a simple answer may be misleading. You do not mention the specific type of entity you are talking about nor the nature of its business or other activities. For example you mention a "non Profit" and then Mention "donations". "Donations" is normally a word used with a charitable organization. Typically, both a non profit business entity as well as charitable entity may purchase real property. Whether they should do so and the manner in which the real property is to be utilized is dependent on various income/property tax and other factors which should be discussed with your CPA and your attorney. Talk to both of them and don't rely on simple answers to simple question.

In addition to what my colleagues offer, I will add that the corporation or entity documents (Bylaws, operating agreement, or other association formation documents) must indicate it is authorized to purchase real property. If not, it needs to be amended.