Parents' OCI Details Not Matching During e-OCI Application – Anyone Else?

One thing I'd recommend is checking every parent's detail against the OCI card itself before submitting.

When we applied through VFS in the USA, I almost copied my father's details from an older passport instead of the current records. I corrected it before submission after noticing the mismatch.

Also make sure the uploaded birth certificate, parents' passports, OCI cards, and signatures are consistent. I've seen applications delayed because parent names or signatures didn't match across the uploaded documents. It's worth spending a few extra minutes checking everything before clicking submit. 

I applied from the UK for my daughter's OCI earlier this year.

In our case, my own name had a minor spelling difference between older Indian documents and my foreign passport. Before submitting, I checked the document checklist and included a notarized affidavit explaining the variation because it wasn't a formal legal name change.

The application took a little longer than expected, but we weren't asked to resubmit everything. Looking back, providing the explanation upfront probably saved us time.

If the difference is due to marriage or a legal name change, I'd include the relevant supporting documents from the beginning rather than waiting for a query. Official guidance also notes that formal name changes and spelling discrepancies are handled differently. 

We had something very similar while applying for our son's OCI in Canada.

My wife's surname changed after marriage, so her current passport and OCI card matched each other, but her cancelled Indian passport still showed her maiden name. We completed the application using her current legal name where requested and uploaded the supporting documents showing the connection between the names, including our marriage certificate.

A few weeks later, VFS requested a brief explanation confirming that both names belonged to the same person. After we submitted it, the application continued without any further issues.

From what I've seen, name differences are fairly common, but it's important that the supporting documents clearly establish the identity. Slight mismatches are usually handled through additional documentation rather than guessing which name to use. Requirements can vary depending on the Indian Mission handling the application.