Originally Posted by
PVDtoDEL
Faking a printout isn't the greatest idea. Once you enter the building, you can't get out...
Why so, You have every right to leave the Terminal till you board the aircraft (You can do that after that also, but relatively complex).
What if your plans change / Connecting flight cancelled / Etc.
I did it many a times - The CSIF will ask you why - Give a reason.
Note: I do not support faking the printout, but want to point out that you can leave the terminal.