Questions about example sentences with, and the definition and usage of "Yy"

Q: I am YY of ZZ corp.
 
Mr. XX shared with me your email address to inform you that I took over his work.
 
As he told you in his previous mail, the new registration (#103) has already been issued.
In connection with this, please be informed that the old one (#102) should be deleted from the registration, and we have got agreements from all customers.
 
Therefore, we would like to delete the old registration(#102).
Could you provide us with signature on the attached document and send it to us by courier? Three copies of them are required. Please see the attached reference to understand its contents.
 
Your support would be greatly appreciated.
 
Best regards,
YY soa natural?

Q: I saw YY. soa natural?