Client: I’ve tried logging in with the username and password you sent me yesterday. It’s not working and frankly I don’t have time to mess around with passwords.
Me: Send me your username and password and I’ll try it from our end.
Client: Sure my username is Susan1456 and my password is Donkey
Me: OK, I logged in straight away. This is really weird, I can’t think why it’s not working for you. Can you send me a screenshot of what you can see on our website?
Client sent a screenshot of what they were looking at.
Me: I see what the problem. You’re not on our website.
The next day I got an email saying “Thank you, I have now logged in. You should have asked me what website I was on to save me time.”