official domain differs from the app about page, check here
Exchange apps and site footers both print a domain. When the two disagree, compare the main domain in the sign-up address bar with the one inside the app.
Check by lining up the main domain in the sign-up address bar, the site address on the app about page, and the footer domain; all three must match.
Key points
Read the address bar last
In the sign-up page URL the main domain is the last two labels; subdomains may differ, the main domain may not.
Open the app about page
Settings usually lists an official site under about or version info; compare it word for word with the address bar.
Footer is the third copy
Site footers usually print the main domain too; three matching copies is the bar before you fill the form.
Common questions
What if the app about page lists no site?
Open the help or terms link inside the app and compare the main domain in that address bar.
Does a different subdomain mean a fake?
Not by itself; subdomains often split by language or feature, so compare the last two labels.
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Sources：main domain in the sign-up address bar and the site address on the app about page · Note the last two labels of the sign-up URL, then open the app about page and compare the two domains character by character. · Checked on 2026-10-17
Risk and disclosure
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