ScopeIntended Audience: All End UsersThis article outlines the reasons why some  brands do not send allow the sending of 2FA codes to VoIP numbers. If you didn’t receive a two-factor authentication (2FA) message, a.k.a. multi-factor authentication (MFA) or security code, on your number, it could be because the brand you requested it from doesn’t send 2FA messages to VoIP telephone numbers (TNs). This is a common issue within the industry for all VoIP/wireline providers, which stems from the concern some brands have with VoIP TNs being used to set up fake accounts on their websites. We see these deliverability issues most frequently when the 2FA or MFA is sent from a short code.Although we have engaged these brands in the past, creating a solution that keeps fraudulent uses of VoIP TNs from interfering with these brands' services remains a topic of discussion. In the meantime, we’ve compiled a list of brands that don’t send 2FA messages to our TNs:FacebookGoogleInstagramOutlookTwitterVenmoWells FargoTinderZelleAmeriprise FinancialNOTE: This is not a complete list. We’ll continue to update it as we learn of other brands that should be included.