How the Bindery notification program works
Bindery (bindery.jonaddams.com) is a document application operated by Jon Addams. It can send you a text message when something happens to a document you already have access to — most commonly when a colleague mentions you in a comment, and in future when document processing you started has finished.
Text notifications are off by default. Nothing is ever sent to a number until that number has texted us first.
Registration is deliberately inbound: you send us a message, we never send one to an unconfirmed number.
nutrient.io and pspdfkit.comaccounts — a personal Google account is refused. The opt-in screen is reproduced below, and support@jonaddams.com will walk anyone who needs to verify it through the flow directly.You are never asked to type a phone number into a form, so a number cannot be registered by anyone other than the person holding the handset.

What the opt-in screen shows. Under Settings → Notifications, Bindery states that text notifications are off and that it never texts a number until that number has texted first. Alongside the opt-in control it repeats every disclosure on this page — what the messages are, how often they come, that message and data rates may apply, that STOP opts out and HELP gets help, and that consent is not a condition of use — and links the terms of service and the privacy policy. Choosing Set up text notifications then names the number to text and shows a four-character single-use code beneath it, good for ten minutes and usable once. There is no field to type a phone number into.
The program is free to join. Message and data rates may apply. Message frequency varies. Messages are sent only in response to activity, so how many you receive depends on your own use of the application.
No marketing messages are sent, and consent is never a condition of using the application.
See the privacy policy and the terms of service.