Sustainable Development Acquisition I Corp. announced a private placement of an unsecured promissory note in the principal amount of up to $550,000 on December 21, 2022. The transaction included participation from returning investor Sustainable Development Sponsor, LLC.

The note does not bear interest and is repayable in full upon consummation of the company's initial business combination. The note is convertible into warrants at a price of $1 per warrant.