Guides & Factsheets - Bacs Service Number

What is a Bacs Service User Number (SUN) and do I need one?

A SUN is a unique six-digit number used to identify the business paying or receiving money through a direct debit Bacs transaction. To use Bacs a business must have access to a SUN, download our guide to find out everything you need to know about SUNs and how to get one.

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Bacs Sun guide

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