Can I send a request like the following to my Manager (Boss)?
Further to my several requests for the vacation payment, once again, I would request you to consider my pending case and settle the payment at the earliest.
As it has been pending since July 2006 and it has already been delayed, you are requested to arrange the vacation payment as soon as possible.
I hope, you will probably consider my case this time and do the needful.
The only thing I would do is I would delete "probably".