::Hi Sandy,
I work for an ISV called Fidesic that offers this such service. We have web based approvals, and can apply a signature to the check (including multiple signatures) of the person who actually did the approval.
If you need less than 3 users we could set you up with the free version and you could use it for as long as you like at no cost.
You can check it out here if you are interested, and feel free to reach out to me on here or on linkedin if you have any questions: https://www.fidesic.com/product/vendor-payments