I would include a tracking number at all times, and provide you with the tracking number immediately after the courier picks up the mail from me. The cheapest option at Canada Post (regular mail) will NOT be used for this purpose due to the absence of tracking information.

邮件寄出后 我处会立即将追踪号发至贵处以供查询 因此不会採用不具备追踪信息的廉价平邮

If there is anything else you would like me to know about the translation you are requesting, you may write them down in the "Notes" section here. For example, you may wish to explain the purpose for which the translation would serve, tell me which organization(s) the translation would be submitted to, or let me know the procedure(s) that the translation would be required to go through, etc.

倘若贵方希望向我处交代其它任何相关事宜 可于上方「备注」区框內阐明 例如该份翻译件之用途 该份翻译件所要抵达的机关和机构 以及该翻译件所要经历的程序等