Hello,

More information is needed, possibly, about your check.

I have customized a check report to print on paper that folded up and became its own envelope (Self-sealing check).  Is that what you are asking about?  In my case the solution was printed on one side of the check form, like a regular check. We used a check form with an old-fashioned ruler to line up the fields on the screen properly, to match the form, using Acumatica Report Designer. 

If I am on the wrong track, please provide more information.

Laura