Squarespace customers should always go directly to www.squarespace.com and sign into their accounts from there. If there is something that they need to do, they will be notified after signing in.
A "Squarespace Your Domain Account Is At Risk" Scam
From: Squarespace - email@example.com
Sent: Wednesday, March 10, 2021, 11:33:40 AM EST
Subject: Your Domain Account Is At Risk
Your Credit Card Might Have Expired?
We were unable to authorize your credit card payment for your website (Domain).
Your credit card may have changed or expired. Please visit the Billing panel of your site to re-enter your payment information or use a different credit card.
RE-UPDATE MY PAYMENT METHOD
Squarespace customers who have already been scammed are asked to contact Squarespace for help.