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Signup Form for your website

Here is a link to an answering service signup form template on jotform.  You can select this template and edit it to your liking.   This will give you a fillable online signup form for your website as well as a PDF form.   You will have to pay for the premium version to remove the watermarks from the PDF version.   But the online version has no branding and will email you with each signup.  

https://www.jotform.com/form-templates/answering-service-signup