There is more than one reason divorce can matter.
Depending on the pension system and dates involved, questions may arise about a former spouse’s record, Child Benefit/caring years or a pension-sharing arrangement.
Caring history after separation
If parents separated and the person receiving Child Benefit changed, it can be useful to map who was the main carer, who received the benefit and where the child lived for the relevant tax years.
Evidence can be broader than one form
Where historic evidence is required, relevant material can include Child Benefit correspondence, bank records, school or GP correspondence, council tax, tenancy/mortgage records and other dated evidence. The department decides what evidence is sufficient for the particular route.
Pension sharing
A divorce can also involve pension-sharing arrangements. Do not confuse State Pension rules with workplace/private pension sharing; they are different systems and the relevant documents matter.
Make a simple timeline
Write down relationship dates, addresses, caring arrangements, who received Child Benefit and the years showing gaps. A one-page timeline often makes a complicated history much easier to discuss.