I assume you have some sort of group that determines which data goes on which check, correct? If so, you can do this:
1. In the Section Expert for group footer for this "check" group, turn on "Reset Page Number After".
2. For the signature block that you want to suppress, put the following in the suppression formula:
PageNumber > 1
This will set page number of the first page for every check to 1 and suppress the signature if the page number is greater than 1.
-Dell