Hello zbaby - Welcome to the forum, this is a little tricky as you will have to submit original form, and both the Sponsor and applicant have to sign. In our case I (sponsor ) filled in all the forms, signed and marked the places where my wife (applicant) needs to sign. I then sent the forms via DHL to her in Dubai , she signed them and sent them back via (DHL ).
It helps if you know someone travelling back and forth , then you can give them the forms and hopfully save some money on DHL. All the best.