1
general::
Forward something, as in He's moved; I'll send on this letter to his new address. [First half of 1800s] 1. send someone on. Cause someone to go on an errand or path, as in I sent your brother on an errand but he should be back soon, or They've sent us on a wild goose chase. [Second half of 1800s] 2.
American Heritage Idioms
2
general::
Phrase(s): send someone or something on (ahead) (of someone or something)
to dispatch someone or something to arrive before someone or something else. • I sent my personal assistant on ahead of me to get the rooms ready. • Jeff sent on his luggage.
McGrawhill's American Idioms And Phrasal Verbs