Family visa refused due to overstaying and lying

[Kiddo19]

Hi my sister (63 years old) and her husband (65 years old, got dementia for a few years) came to UK together in 2010. They separated while in UK. So my sister overstayed for 4 years and went back to her country in 2014. Sister's husband did not over stay. They were not divorced but been separated for years and barely spoke to each other.

This year they both applied for family visas to visit me (husband wanted to come for his personal reason but he had no family here, so he spoke to my sister to apply together). They found an agent to apply for them, my sister didn't tell the truth. 3 weeks after applications submitted the embassy phoned the husband a couple of times to ask questions about my sister. They asked him when she left UK, has she overstayed etc. The husband didn't know my sister's overstaying and years. So he just said a date before her visa's expire date.

They both got refused. They found out that my sister overstayed and decepted the fact. Her husband was refused on the ground of dishonest.

Now he wanted to appeal or reapply a new application based on his age that he could not remember the dates of my sister's return, plus he's got dementia so couldn't remember things. Does he have a chance? Can my sister come back after 10 years ban? Many thanks, K

[Kiddo19]

Opinions and advice please?

[Casa]

There is no appeal for a refused visitor visa application. Re-applying isn't likely to achieve a positive outcome.

[Kiddo19]

There is no appeal for a refused visitor visa application. Re-applying isn't likely to achieve a positive outcome.

Thanks for the first answer!!
The husband felt that he was tricked by the Embassy. He did not overstay, he got refused because he was asked questions about his separated partner. He did not have intension to lie for her.

Now he asked me to help him ,I'm not sure if just his explanation would be sufficient ,anything else I need to add ? Many thanks

[Casa]

Your only hope may be to reapply submitting medical evidence of his dementia and inability to understand the questions he was asked.

[Kiddo19]

Your only hope may be to reapply submitting medical evidence of his dementia and inability to understand the questions he was asked.

Thanks, that's a great shout!

He can get the medical evidence and medical records.

A new worry: will his dementia make him not able to apply for a visa ?

[CR001]

[A new worry: will his dementia make him not able to apply for a visa ?

That would be discrimination.