POSDM - Receipt number gap checking for all transaction types

Hi Experts

Here comes a technical requirement in POSDM due to POS functionality constraint.

Client wants to perform transaction receipt number gap check and duplicate check. My understanding is that POSDM would perform these checking for only one POS transaction type (in this case, say for example, all sales transactions) and will not perform this gap check together with other transactions. (say if i only assign the tasks for checking to the sales POS transaction)

However, client's POS will transfer all types of transactions (including sales, z-read, login, logoff, etc) using THE SAME sequence, meaning the transactions can be like below:

#001: sales

#002: customer return
#003: login

#004: product enquiry

#005: sales

Are there any way / configuration that I can use to fulfill this requirement?

Many thanks in advance!

Best Regards

Dom