This letter informs a financial institution that you would like to add another party to an existing account.
1234, Main Street
Boston, MA 02123
04 April, 2005
<Recipient Address Goes Here>
Re: Account No. <number>
I would like to add my <nature of relationship>, <name>, to this account. <name>'s Social Security number is <Social Security number> and <his/her> date of birth is <insert date of birth>. If you need additional information, or if <name> must fill out an application, I would appreciate if you would provide one.
Thank you for your assistance. If you have any questions or need additional information, please do not hesitate to contact me.
encl: <List of enclosed items goes here>