A "Payment didn't go through for your campaign at …" email means one thing: a campaign charge failed, so that campaign is on hold — not cancelled. Fix the card and it gets moving again. Nothing is charged when you update the card; Grassfed re-runs the original payment once a working card is on file.
Fix it from the email
Open the email and select Update payment method. It leads to a secure Stripe page.
Enter your new or corrected card. Stripe saves it to your account — you are not charged at this step.
That's it. Grassfed re-runs the held campaign payment against the new card automatically.
Or fix it from the portal
If you'd rather not click an email link, the same fix lives in your Settings:
Sign in at app.grsfd.ai and open Settings → Account.
Select Update card to add or replace the card Grassfed bills. (To review past payments and the invoice behind each one, open Settings → Billing — see Reading your billing history & managing payment.)
Confirm it worked
Open Billing in the portal. The failed charge shows as Failed with the bank's reason next to it; once the re-run succeeds, a Paid entry for the campaign appears. Your campaign comes off hold at that point — no further action needed.
If you don't act
Grassfed nudges you: after the first notice, a reminder — "Reminder: your campaign at … is on hold" — arrives every 2 days, up to 5 emails in total. After the fifth, the emails stop and someone from Grassfed reaches out personally. The campaign stays on hold the whole time; it is never silently cancelled, and it never sends without being paid for.
Important — Card emails and safety
A real Grassfed payment email never asks for card details in a reply — it only links to a Stripe-hosted page. If anything about the email looks off, skip the link entirely and use Settings → Account → Update card in the portal instead; it does exactly the same thing.