I have recently lost my ATM card and decided to open a DR bank account to be able to wire in cash. Walked into the closest bank which happened to be BanReservas and asked what documentation they need (I am not a DR resident btw). Was expecting a long list of IDs, bank references etc. but they said just a passport would do and handed me a 2 page form. I filled it out and 45 minutes later walked out with two accounts: USD and pesos. Completely unexpected and very nice experience overall.