Martin Lewis has issued a warning to travellers planning a holiday this summer, with 'three crucial alerts'.
In his ITV show, he told viewers: "Border control and flight checks are getting more stringent. There's an immigration issue going on around the world, and that means countries are getting stricter on who they let in. So you need to be more diligent with your checks."
"I've got three crucial alerts for you," he said.
"First of all, two checks everybody needs to do on their passport now. These are, very importantly, this is about the day that you will enter the country.
"Now, if you have done those checks, if there's yes to either of those, then the safest thing is to renew before you go. It takes three weeks, typically, to get a new passport, and it's cheaper to do it online. But let me be honest, I'm hearing so many cases like this.
"If I was seven, eight or nine months away, and the rule was six months, I'd probably pay safe and get a new passport first anyway, so that I've got more on it, because it's being so tricky, and it's very similar.
"If you're traveling to the USA or passing through the USA, you need to sort your ESTA now there is heightened border security in the States. If you don't have this as your sort of online visa, if you like, without one, People are being denied entry. You need to be careful."