I have successfully been using EZ Check Writer out of QB for a while now, but have just recently encountered where the stub data is not transmitting over from QB properly. I am presuming that I have something set-up wrong.
i.e. - If I use a check to pay multiple invoices it does not display what invoices are being paid on the stub. Or if I cut Payroll checks, it is not printing the paystub data.

Dear valued customer,

Please check the step 2.2. Please make sure you select the TOP format with ezChekcPrinting setup if you need to print check with stubs.
http://www.halfpricesoft...nt-quickbooks-checks.asp 

Please check this settings. Let me know if you still see this issue.

Thank you.

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