I thought I had posted something like this, but could not find it. Of course I did not look very hard. Top tips on avoiding identity theft this summer | Action Fraud

Equifax’s top tips to keep your identity safe whilst on holiday

Don’t clearly display your home address on your luggage. Instead use a work address or mobile phone number.
Don’t write down PINs – use a more memorable number.
Keep your personal documents, such as your passport, in the hotel safe.
In crowds, keep your bag either strapped across your body or held firmly.
A concealed money belt is an ideal way to carry your cards and valuables.
Leave your passport number with someone in the UK in case it is stolen or lost. Don’t carry these details around with you.
Have the phone numbers for your bank with you so you can quickly cancel any lost or stolen cards
Make sure your mobile/smartphone is password protected.
On the return home, check statements and your credit file to make sure there hasn’t been any fraudulent activity.