The sentence structure of 内容を必ず確認のうえ > **** **** 29 I noticed that is used quite frequently in banks' websites and financial documents, like in the above example. It must be something simple and well understood, but I have difficulty reconciling the structure of the sentence: 1. Why the direct object does not have any verb? 2. Why the adverb is used before a noun? 3. What does refer to? I cannot relate anything in the contents of the document. Is kind of an abbreviation of here and could possibly answer questions 1 and 2?

is technically a noun, but it is behaving as a verb in this sentence. If the sentence ended after the first part, you might say The noun and the verb combine to act as a single word.

is being used to say " **make sure** you check the content"

is usually used in more formal situations, it comes after a verb and is a conjunction meaning " having done (verb)".

The example sentence you gave would be something along the lines of "Once you've made sure to check the contents, please then fill out the 2017 declaration form."