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Copyright © Optimal Payments Plc. All rights reserved. Optimal Payments Limited is authorised by the Financial Conduct Authority under the Electronic Money Regulations 2011 (FRN: 900015) for the issuing of electronic money and payment instruments. The NETBANX® trademark is the property of Netbanx Limited. NBX Merchant Services Corp. is a registered ISO/MSP of Merrick Bank, South Jordan, UT 84095. NBX Merchant Services Corp. is a registered ISO/MSP of Fifth Third Bank, Cincinnati, OH.