Never Forget a Pending Invoice Again
Every Wednesday morning, Notis sends a WhatsApp to customers with pending invoices. Friendly reminder, no pressure, and payment goes up by 15–20% week-over-week.
Trigger
Recurring schedule
Notis starts this workflow on a schedule, such as daily, weekly, or during business hours.
Action
Send message
Send a text message to a whatsapp number. note: the message will reflect on the recipient's phone number only if they have texted first.
Why this helps
Invoices sit unpaid for weeks. You hope customers will notice on their own. They don't. Cash doesn't come in. You're left wondering who's going to pay and when.
- Scheduled automatically on the rhythm you choose (weekly, bi-weekly, etc.)
- Customers get a gentle nudge at the right time
- Payment speed increases 15–20% on average with consistent reminders
Setup
Build it in a few focused steps.
- 1Connect Stripe and WhatsApp to Notis.
- 2Tell Notis: 'Every Wednesday at 9am, send a WhatsApp to customers with unpaid invoices over 5 days old. Keep it brief and friendly.'
- 3Notis can personalize the message with their name and invoice amount if you want.
- 4Test by manually triggering a reminder to see how it looks.
- 5Adjust the schedule if needed (e.g., 'send on Thursdays' or 'send every 3 days').
- 6Track payment rates before and after. You should see improvement within 2 weeks.
Questions about this workflow
Can I exclude invoices past a certain age?
Yes. Tell Notis: 'Only remind about invoices 5–30 days old. Anything older, I'll handle manually.' This keeps reminders relevant and not overwhelming.
What if they keep ignoring the reminder?
You can set escalating reminders: first reminder friendly, second reminder adds urgency ('payment due in 2 days'), third reminder includes a phone number or support link.
Will reminders bother customers?
No, if timed well and kept brief. A single friendly reminder per week is welcomed; daily reminders would be annoying. Notis helps you find the sweet spot.
When this happens · Trigger
Do this · Action
Supported Triggers and Actions
Notis builds workflows that link Stripe to Whatsapp. A trigger fires from one place; an action lands in another.
Stripe triggers
Whatsapp actions
Charge Failed Trigger
Triggered when a direct charge fails in Stripe's legacy Charges API
Create message template
Create a new message template for the whatsapp business account. templates must be approved by whatsapp before they can be used. templates are required for marketing messages and messages sent outside the 24-hour window.
Checkout Session Completed Trigger
Triggered when a checkout session is completed in Stripe
Delete message template
Delete a message template from the whatsapp business account. this permanently removes the template and it cannot be recovered. only delete templates that are no longer needed.
Invoice Payment Succeeded Trigger
Triggered when an invoice payment is successful in Stripe
Get business profile
Get the business profile information for a whatsapp business phone number. this includes business details like description, address, website, and contact info.
Payment Intent Failed Trigger
Triggered when a payment intent fails in Stripe
Get media
Get information about uploaded media including a temporary download url. the download url is valid for 5 minutes and can be used to retrieve the actual media file. this is useful for downloading media that was sent to your whatsapp number.
Product Created Trigger
Triggered when a product is created in Stripe
Get media info
Get metadata about uploaded media without generating a download url. this is useful for checking file size, type, and hash without downloading the file. use get media if you need the actual download url.
Subscription Added Trigger
Triggered when a subscription is added in Stripe
Get message templates
Get all message templates for the whatsapp business account. templates are required for sending messages outside the 24-hour window and for marketing/utility messages.
Subscription Deleted Trigger
Triggered when a subscription is deleted in Stripe
Get phone number
Get details of a specific phone number associated with a whatsapp business account.
Get phone numbers
Get all phone numbers associated with a whatsapp business account (waba).
Connect any two apps with Notis in the middle.
Not just Stripe and Whatsapp. Any combination from 1,000+ integrations.
When this happens · Trigger
Do this · Action
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