Customer Passwords Never Migrate Between Platforms — And Most Stores Find Out Too Late

Why This Isn't Fixable

Passwords are stored as one-way hashes, not recoverable text. A platform cannot hand another platform something it doesn't itself possess in readable form. Saved card details fall under the same principle for PCI DSS reasons — payment credentials are tokenised against a specific processor and cannot be exported. Any migration tool promising to move passwords is either wrong or doing something you should not want.

The Failure Sequence

It unfolds the same way every time. Launch day goes smoothly. Then a returning customer tries to log in, fails, requests a reset, and the email doesn't arrive because the new domain's email authentication was never configured. They try twice more, then contact support. Multiply that by every returning customer over two weeks, and a technically successful migration becomes an operational crisis.

What Has to Be Ready Before You Flip DNS

Every item on this list needs to be verified working, not assumed:

• — SPF, DKIM, and DMARC records configured on the new platform so reset emails actually deliver
• — A tested password reset flow — send one to yourself from the live environment
• — A proactive email to all customers explaining the reset before they discover it
• — Support macros written in advance for the reset question
• — Order history visible to customers once they're back in, or you'll field that question next

The Re-Engagement Angle Most Stores Miss

A forced password reset is a moment of contact with your entire customer list — which some merchants deliberately convert into a re-engagement campaign. Pairing the account activation email with a welcome-back offer turns a friction point into a reason to return. It doesn't remove the friction, but it recovers some value from it.

The 14-Day Support Spike

The migration itself is the easy part. The aftermath — customers who can't log in, can't find old orders, and notice missing reviews — is where unprepared stores lose revenue. That spike arrives over roughly two weeks as customers return at their own pace, not in a single wave on launch day. Staffing for launch day and standing down on day two is a common and expensive mistake.

Migrating Without the Support Crisis — With Devrex Digital

Devrex Digital handles migrations with email authentication, reset flows, and customer communication planned before DNS changes — not discovered afterwards. If a replatform is on your roadmap, the password reset is entirely predictable, which means it's entirely preventable as a crisis.