求问：关于approved photo

收到学校人事处的来信，说是要提供：

* a photocard with an approved portraitphoto - we will send this photocard with the letter of appointment. Onthe photocard you can also find the specifications for the photo. Alsothis you need to send back to the above adress.

似乎是说要在照片卡上贴一个经过核准的照片？这个照片该怎么弄呢？

虽然信上说照片卡上会有操作说明，但是还是想请达人讲解一下。谢谢先！