How does divorce work?

[ssd]

I mean how is everything split, when the stay at home partner doesn't know what the other one has?

Married 20 years with grown up children.

SAHM clueless about money.

Any advice, they both have lawyers

Both sides have to fill in a form saying what they have.

It has been known for people to lie.

Both sides have to fill in a Form E, then they exchange it. This is a legal document and omitting information can be considered contempt of court. Based on that information you can mutually agree a fair split, go to mediation, let your solicitors fight it out or ask a judge to make a ruling. The first is free, then it goes up in price/length of time. A judge will only sign off the financial order/clean break if they consider it a fair settlement. Edited for wrong link.

https://www.gov.uk/government/collections/divorce-and-civil-partnership-dissolution-forms

BTW there is divorce board on here, you might find similar threads/posts that are more helpful

Clueless in what sense?
Totally financially naive, doesn’t know how to pay bills, balance income and outgoing expenses. Totally sheltered from financial responsibilities since leaving home?
Is the home owned or rented?
Does the spouse work for himself or for a company? Has the partner been giving her housekeeping money (might hint as to income bracket)? Has the partner ever mentioned a pension plan? If the home is owned what is the estimated value?
Does the partner moan about money woes?

If the person you’re asking about has a lawyer as you say, then they’re better off asking a professional who knows their specific circumstances, rather than a friend of a friend asking on Mumsnet. It’s too important not to get proper advice, excellent though many MN replies are.

Their lawyers will be able to answer this.

Thanks