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Billing types: WO, WO-PIN, SMS-O, WO-RAR, WO-PFI, DO


Also known as

Web Opt-in, Web Opt-in with no MO, Web Opt-in via MT delivered PIN entered online, Double opt-in, SMS Based Opt-in, Web Opt-in requiring an MO response, Web opt-in PayforIT (UK only), SMS Based Double Opt-in

See for more information on each. 


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