Add notification to Woocommerce booking when a waiver form is completed

We have a woocommerce booking website, for each experience the client needs the customer to sign a waiver, we have created a online waiver form, where customers are required to complete, they add their booking number to it. We are using a booking export plugin which provides a list on a daily basis of who is attending that day, in that export we can include any fields relating to the woocommerce booking So we just need a simple way to include within the list if the customer has completed the waiver form or not, please put w1aver as the first word of your proposal so I know you have read this. If you have another way to get customers to complete a waiver form online, where they don't need to have a woocommerce account, but can combine the form with the woocommerce booking happy to look ideas Pleas don't be the higher end of price bracket, as the client won't be interested