Oh yes, mine just can't help but tell lies all the time. I think he lied while we were married but I just believed everything that came out of his mouth, but in the last two years I don't think we've had a conversation or an email where he hasn't lied about something. Yes, and believing the lies they tell, so mine will change the facts of our marriage, his latest one was, you never worked! And he completely believes this now, when the truth is, I've worked for the entire 20 years of marriage, the first 10 earning more than him, and the second 10 working 15 hour days in shit work from home jobs because he didn't want the DCs going into childcare.
DCs have 10 week summer holidays this year, the excuses why he can't have them for any of this time have been, (1) he has no holiday left and he works you know, (2) he has no money, (3) he wants to take his partner (the OW) on a much deserved last minute break, (4) (which he emailed to the DCS directly) his work have cancelled all summer leave. He works in IT for a law firm. The truth of course is that he doesn't want to see them.
He declared himself bankrupt at the beginning of the year, and then this summer sent me an email about how the trustee in bankruptcy had thought my behaviour throughout his bankruptcy had been dreadful. I had only emailed her to ask where I stood with my house because he'd deliberately delayed having his name taken off the deeds until he could be declared bankrupt. So I forwarded her a copy of his email and asked her to clarify to me what issues she had. She sent me a response saying, that she was only ever professional and had not made such claims, but of course she had no control over the things my ex chose to say. I sent him a copy of that email, funnily enough he never bothered to respond.
I've disengaged now, he tells lies for personal gain, attention seeking, or just simply because the truth is an alien concept. It's good for a laugh with friends over a glass of wine if nothing else.