 SAN DIEGO, CA, April 14, 2021 GLOBE NEWSWIRE -- GreenBox POS NASDAQ: GBOX GreenBox or the Company, an emerging financial technology company leveraging proprietary blockchain security to build customized payment solutions, today announced the company has selected Signature Bank Nasdaq: SBNY, a New York-based, full-service commercial bank, as the banking solution to meet its smart-contract token infrastructure needs. 