"以你方为受益人"可以翻译为 "in your favor" 或者 "with you as the beneficiary"。
在商业或金融语境中，当表达“以某方为受益人”时，常用结构“in one's favor” 或更正式的 “with [someone] as the beneficiary” 来传达这一意思。例如：
The letter of credit is issued in your favor.（信用证是以你方为受益人开立的。）
The insurance policy is written with you as the beneficiary.（这份保险单是以你方为受益人签发的。）