|Which is correct?|
Explanation: Neither is singular and requires a singular verb, so use addresses.
Neither is an indefinite pronoun. Indefinite pronouns refer to an unknown or undetermined person, place or thing and they can be tricky. Some indefinite pronouns always take a singular verb. Some always take a plural verb.
Another, anyone, anybody, anything, everyone, everybody, everything, nothing, each, either no one, neither, nobody, one, someone, somebody and something are always singular.
Both, few, many and several are always plural.