Ala. Code § 5-17-24: Taxation.

A credit union shall be deemed an institution for savings and, together with all the accumulations therein, shall not be subject to taxation except as to real estate owned, as to the franchise tax required of other corporations and as to the excise tax required of financial institutions. The shares of a credit union shall not be subject to taxation or to a stock transfer tax when issued by the corporations or when transferred from one member to another.