Except from an email received from tech support:
I do show that the account has been updated
What is the meaning of "I do show"? To whom or what does "I" refer?
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I do show, employs a technique called metonymy, where one word is substituted for another in which it has a close relationship. It's the same kind of thing as "The Whitehouse announced spending cuts" or "Let's see what London have to say about that".
The definition of Metonymy in general is very broad and rather vague, but it tends to fall into a number of classes, according to the relationship between the substitute and the substituted, for example "a part for the whole", "a tool for its user", and so on, (each with an exciting Greek name, useful for pub quizzes).
In this case it seems like the the technical support guy was substituting themselves with a tool which they use; which appears to be some kind of record system, (maybe a bug-tracker, a financial account, some system logs, or whatever).
The emphatic use of do suggests that, either:
This is the type of statement made by someone viewing online data. They are stating that they can visibly confirm that the account has been updated.