If you want your client to pay your invoice directly, we are a Stripe Partner so all you need do is connect your Chasr account and follow the instructions here to enable payments.
We'll send out the normal email reminders & notifications to your client on your behalf, but included in the email will be a unique URL to enable them to pay your invoice. They'll be directed to a screen like the one below which will enable them to make payment via the Stripe gateway, directly into your Bank Account.
Once this payment has been made, we'll mark the Invoice as "PAID" so you will not need to perform this process on Chasr.
Paperwrk takes no fees for this service. All fees are Stripe processing fees only. If you are unsure, here is an article that might be useful - https://support.stripe.com/questions/see-the-stripe-fee-applied-to-a-specific-charge