Discover Financial Services and Promoción y Operación S.A. de C.V., a payment solutions provider and domestic payments network in Mexico, have formed a strategic network alliance to expand Discover Global Network acceptance in Mexico.Discover, Diners Club International, Pulse and network affiliate cards will now be accepted on Prosa's network in Mexico at POS and ATM locations, according to a press release.The agreement will focus initially on enabling all Discover Global Network cards on the Prosa network. The companies also plan to look at future opportunities to work together . . .