I am in the process of signing up to Monzo for some travel I am doing in a little while (2 two weeks). While I am away I will have both personal and business expenses, so I registered for 2 Monzo cards using the +1 trick to generate different addresses for the same gmail account (http://www.codestore.net/store.nsf/unid/BLOG-20111201-0411).
The problem I now face is that part of the sign up process sends you a text message with verification code. On sending the code for the second account the app complains that the number is already registered. Well that is no good for me and also why do you care? I could change my phone number tomorrow with no impact to you at all as long as I install the app on my new phone.
Please help me get past this.