How does your team actually verify CAM and RET charges before paying them?

We're a team managing 100+ leases and our current process is: landlord sends invoice, someone manually checks it against the lease, controller approves in email, AP processes it.

Feels like this breaks constantly — wrong amounts paid, CAM caps missed, invoices approved without proper lease cross-reference.

Curious how other teams handle this. Is there software that actually does this, or is everyone doing some version of what we're doing?