I received a sentence from a person and the sentence seems grammatically wrong 

> sentence: the letter was sent and follow up from the Department to the
> embassy.


I think the person intended to say "was followed up from ~", so if I regard this sentence like below 

> the letter was sent and followed up from the Department to the
> embassy.

what is the meaning of "be followed up" in the sentence ??

Or maybe the person intended something else using "follow-up" as a single noun in the sentence. How about that ??