In Payables, I posted an invoice # as s467 instead of S467.
Is there a setting so it only lets me enter capital letters in the invoice/document #?

Hi jkueber,

There is an option forcing the check number to use only uppercase alpha characters, but this setting isn't used for other document types such as invoices or adjustments.

Thanks, but will this be changed in the future?

I entered an invoice as s467, it let me post it, which is fine, BUT I entered S467 the next month and it DID let me post it also, even though it is the exact same invoice number...