When I was travelling in a Motorhome around several European countries, I couldn’t get a SIM card from that country because I didn’t have a home address. I was tempted to make one up. Recently, I wanted to post some excess clothes back him to Australia but I had to put a Romanian address on the box “in case there were problems.” I told the clerk I was on my way to Bulgaria so didn’t have one. A guy advised to make one up but I wasn’t quick enough and had to go to the end of the very long lane. Mission failed.