A guest is prompted to sign the rental agreement each time they make a payment. This is an awkward customer experience. And inaccurate, since the rental conditions could have changed since they first signed and we need to honor the original agreement. It doesn't look polished for us to keep presenting the rental agreement to them each time, acting like we don't know who they are.

So if guest already signs rental agreement at initial payment, they don't have to sign it a again for balance.