appreciate the reply here.

In my experience when I merge vendors the system doesn't leave one inactive without transactions, the system simply 'transfers' all transactions to the vendor I keep and the other vendor just 'disappears' (in your example: Anna's transactions are shifted to Marie, and Anna is no longer in the system, not in the active or inactive) - unless I'm missing something and I'm not looking at the right place? 

I'm looking forward to receive some recommendations on the third party delete tool application as well as how this exactly works, does the tool find vendor/customer names in the system without transactions?

 would you be able to direct me if there is a report I can run to find the names (vendor, customer, other, employee) in these centers that have no transactions?

thanks again,

Shulym