I would like to know if Membership Pro can provide only one document for accounts department.
Example : I have 100 subscriptions in one month
Membership can provide a summary with a simple total that I can give to our accounts department insteed 100 invoices ...
Or maybe one document with a detailled listing of all invoices (PDF or others).
I think you can simply use csv export feature for that purpose. Basically, this feature allows you to export all subscriptions records you want into a csv file. You can then simply send that CSV file (contains subscriptions information + payment amount...) to your accounting department. I think that's all they need for accounting purpose