Problems arise in apartment complexes all the time; I should know, I lived in one. A lot of complexes use rent payment portals, because they're safe, secure, and allow landlords to collect payments online and keep track of everything, nice and tidy. Or at least, they are supposed to be. OP shared that they lived in an apartment complex that was acquired by a new management company, which switched the resident and rent payment portals. To say that this move caused disruptions would be an underst…