Depends on the legal rules...would you have to contest his divorce and counter-sue?
And how important it is to you that the legal paperwork reflects the truth as usually the courts don't care and it may cost you money or time you don't want to spend?
I think a few folks here have chewed on this and it is really a very personal choice, so my only advice is to take your time, look at the options and decide what is best for you.
My h filed using ridiculous 'unreasonable behaviour' reasons which is common under Uk law. Actually they were full of projection...a vanisher saying I'd refused to talk to him about our m LOL, no mention of the woman he married 5 weeks after his divorce was final, lots of lies. I could have chosen to contest it or insist on a 2 or 5 year separation but decided it didn't serve me. I knew the truth, even he did actually, my L did, our friends did...no one else cared. So I responded via my L saying that i did not agree with the divorce, saw the reasons as being more about his infidelity LOL but would not contest it. For me, the reality was that I no longer had the husband I'd had and he wanted to divorce me in this s$itty way, so there was nothing worth contesting or investing money or time in.
T: 18 M: 12 (at BD) No kids.
H diagnosed with severe depression Oct 15. BD May 16. OW since April 16, maybe earlier. Silent vanisher mostly.
Divorced April 18. XH married ow 6 weeks later.
"Option A is not available so I need to kick the s**t out of Option B" Sheryl Sandberg