Thanks a thousand times for your help. You're right, only the visa application form requires an applicant's signature and as you mentioned I can directly upload it after validating. Also, I will treat the same for the rest of the forms(Schedule 1 & Family information) meaning that I will upload these forms directly as well and will not print & scan & convert back to PDF & upload. You saved my time, thank you.That's correct. The most important step is to validate the form before uploading it. From memory, I think only the application form required this. Other forms (e.g. Family information - imm5645e) can be printed then scanned or digitally signed in Acrobat or Mac's preview app.