The contribution of a partner to the capital of a limited partnership may be in such form as is provided in the partnership agreement, including, unless otherwise provided therein but without limitation, cash, property, and services rendered, and may be made in such manner as is provided in the partnership agreement, including, unless otherwise provided therein but without limitation, by delivery of a promissory note or other obligation to contribute cash or property or to perform services.
OCGA § 14-9-501