According to Wikipedia's Grammatical Object page,
However, Wikipedia's transitivity page contradicts this with
Which is accurate?
There must be a direct object for an indirect object to be placed in a sentence." In "They sent him a postcard", him is a (non-prepositional) indirect object of the verb sent (which uses a double-object construction). It typically corresponds to the dative case.
However, Wikipedia's transitivity page contradicts this with
Even though an intransitive verb may not take a direct object, it often may take an appropriate indirect object: I laughed at him.
Which is accurate?