I've lost my invitation emails for the Barclaycard for Business app – how do I get a reminder of what my username was?

Call customer services on 0800 008 008, and they'll be able to help you (we’re here Monday to Friday 8am-8pm (GMT) and 9am-2pm (GMT) Saturday to Sunday). If you live outside the UK, please call +44 3332 027 926. (Call charges information).