That setting is the only way I know to stop the numbering on a bill with no new charges.  If it is not working, maybe look to see if you are fully patched on the version you have.  BTW, it is EITHER Premium OR 2020, so make sure you get the right patch for your version.

You can check for the latest patch/version here: https://support.na.sage.com/selfservice/viewdocument.do?noCount=true&externalId=14306&sliceId=1&noCount=true&isLoadPublishedVer=&docType=kc&docTypeID=DT_Article&stateId=15942&cmd=displayKC&dialogID=619320&ViewedDocsListHelper=com.kanisa.apps.common.BaseViewedDocsListHelperImpl&openedFromSearchResults=true

If your clients are getting confused, you might want to switch how your bill reads.  By default/out of the box, Timeslips bills read sort of like a credit card bill: previous balance, new charges, payments received, optional interest, then new balance.  These bill formats seem to work well  when the bill is being sent to an individual or small business.  The more corporate or large the entity you are sending the bill too, the more likely they are to have an entire Accounts Payable Department or use software to track their payables.  This is where the traditional bill format can cause confusion. 

In those situations, I find that if we suppress the previous balance and payments and ONLY show new charges on an invoice, then the confusion subsides.  Now, when the Accounts Payable clerk goes to enter the payable in the system, the Date, Payee, Invoice and Total will work without "doubling" the previous balance/previous invoice in the Balance Due.

So what to do when they don't pay an invoice? You can use a Statement in Timeslips to show your corporate client which invoices you have sent, which payments you have received and which invoices remain unpaid.

Hope that helps.

Nancy Duhon, Esq.
Duhon Technology Solutions, LLC
Master Certified Consultant for Sage Timeslips
Providing individual Consultations and Third Party Remote Desktop Support - including older/unsupported versions.
404-325-9779
[email protected]

We have the same issue with Timeslips Premium sometimes. It does it very inconsistently, but it will print an invoice number on a previous balance with no new charges or AR transactions.  We have the setting set up properly to only print an invoice number on bills with new charges.  I have no idea how to change it, but it sounds like it might be a bug in the program.