美國簽證一定要公司假期批准信嗎?

能取得美國簽證, 沒有公司假期批准信 okay.

If your interviewer asked for company vacation letter, you can tell him/her that you want to get the visa first before submitting your leave application and buy air tickets.

Usually they don't ask for it.

you are grovernment employee, you should no problem to get the vacation paper..?
you also better bring in last 3 months bank statements. and paid studs.
plus you need a good reason why you want to visit US.....
the chance look good for you... so, good luck la.

To increase your chance, it is better to provide return ticket or any travel arrangement.

最好叫上司出一封信證明你幾時放假, 幾時會返香港繼續工作。