bìxū jì shí, yào quèrèn shìfǒu yǔnxǔ, shìfǒu bǎojià, shéi qiānshōu, diūshī zěnme chǔlǐ

必须寄时，要确认是否允许、是否保价、谁签收、丢失怎么处理。

When it must be mailed, confirm whether it is allowed, whether it is insured, who will sign for it, and how to handle loss.