In the system I'm migrating from, every transaction has the transaction ID attached to the record, whether it's via Stripe, PayPal, etc. This is absolutely necessary! Just last month I had to go in (to my current system) and sort out some incorrect charges/payment, and the only way to find the correct records was by comparing the transaction ID. I have several monthly recurring invoices at the exact same price. As a workaround, what I'm going to do is make sure they are all recurring on different dates (as some currently are on the same day, same amount, and only minutes apart). However, as the business scales (the whole reason I'm moving to Zoho Books!), this workaround will become ineffective. I'm scratching my head as to why/how this hasn't been raised before!