Locate 2005 Joint Account Deposit

I need assistance finding a record of a deposit made in a joint bank account around May 2005. This is needed for a divorce proceeding.

Details:
- No documentation available (statements, slips, etc.)
- Approximate date and amount of deposit known
- Need this for legal requirements related to divorce

Ideal Skills & Experience:
- Experience with bank record retrieval
- Familiarity with legal documentation for divorce
- Attention to detail and reliability