Just to be clear, I send them an internal secure message using the left side menu. Now that I am looking back on it, I actually think they did not give me an increase, but I honestly can't remember. Sorry.

Here is the actual message I sent to Chase Card Services, Subject "Account Inquiry"

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>I am requesting a credit line increase.
Total Annual Income: xxxx
Employment Status: [Employed/Unemployed, PT/FT]
Occupation: [your job]
Monthly Mortgage/Rent: x
Expect Credit Usage per month: x
Desired Credit Increase: xxxx
My credit score is in excellent standing and I have not
made any late payments. I have frequent use of this card
and recently opened another checking account with Chase.
Thank you,
[name]

They responded back in the message center the next day:

>Hello [my name],
Thank you for contacting us.
[my name], by submitting a request for a credit line
increase, you authorize us to obtain a copy of your credit
report, credit-reporting history and any other information
to determine if we can approve the request. After we
receive your response, we'll reply with our decision.
We appreciate you being a Chase customer.
Thank you,
[agent name, I think]
Chase Email Servicing

Edit: formatting