What version of Timeslips? Does it only affect this one client?  

That is not a common problem. 

First thing I would check is whether you are doing anything with the invoice number in the client settings other than Use Global Invoice Numbers.

Nancy Duhon, Esq.
Duhon Technology Solutions, LLC
Master Certified Consultant for Sage Timeslips
LawPay Partnered Consultant
Providing individual Consultations and Third Party Remote Desktop Support - including older/unsupported versions.
404-325-9779
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In addition to Nancy's question, the other possibility is that invoices were generated and then undone which could have an impact on invoice numbers. Someone could have gone in and reset the next invoice number. Unfortunately I have seen where people print invoices and send them out but don't finalize then recreate or finalize and then undo / redo and this can impact invoice numbers. 

Okay all the client's are set up with global invoice numbers.  With regards to doing a draft bill does that effect it?  I am seeing when I finalize bills it shows a invoice number and when it gets emailed to client it is showing another invoice but the bill was finalized. 

That sounds really strange. Whatever invoice number is on when you finalize should be the invoice number it shows. Might be something wierd in your billing layout. Would need to look at it. 

That sounds really strange. Whatever invoice number is on when you finalize should be the invoice number it shows. Might be something wierd in your billing layout. Would need to look at it.