[Your Name, & Address here]
[Recipient Name & address here]
Sub – [Loan or account] &, [account no.]
This is to inform you that I, and [former spouse name] have [divorced or have filed for divorce].
Therefore, as per the settlement agreement made between us, also a part of our divorce ruling, the account mentioned above now belongs to me only.
So, all the future statements and communications regarding this account are to be sent to me only.
I would appreciate if you update your records accordingly.
Thanks you for your prompt attention into this mater.
Encl: [Enclosures List here]