When was the last time you looked at your passport? 

Does it have enough free pages to hold entry stamps? Some countries won’t let you in unless you have at least two blank pages in your passport. And what about your passport’s validity?

If it expires within six months, it’s time to renew it immediately. Many countries won’t let you enter if you have less than six months left. 

And what about your kids? Their passports are only valid for five years. And they can’t apply or renew online. It has to be done in person. So check dates carefully.