I would have them send it to you with a tracking number - it costs very little, but that way there is a record of it and everyone is covered-
I have often had people send me garments they had purchased from me to embroider the next child's name, as well as those who want me to make a christening gown from a wedding gown.
I never send ship anything without a tracking number. Even the burp cloths that I sell, I send via USPS online which automatically has a tracking number.
Welcome and good luck!
My best advice --- patience and lots of hard work!