1.3 CanonicalisationHighVerified
Unintended cross-domain canonical
A canonical that points to another domain by mistake tells Google my page is a copy of someone else's. I have seen this hand all the credit to a staging domain or a syndication partner.
What it is
Canonical points to another domain by mistake.
Why it matters
Hands indexing/consolidation to a URL you may not control.
How to fix it
Correct to the intended on-site URL.
How to find it on your site
- Extract canonicals and flag any pointing to a different domain.
- Confirm whether the cross-domain target is intended, for syndication, or a mistake.
- Correct accidental cross-domain canonicals to the right on-site URL.
- Re-crawl to confirm.
Cross-reference to ranking and citation factors
An accidental cross-domain canonical can deindex your version and pass the signals to the other domain entirely. It is high impact.
Impact
High if erroneous. Direct.
Evidence
Cross-domain canonicals transfer the preferred-URL signal off-site. Google Search Central, Consolidate duplicate URLs (canonicalization)
Sources