should pictures be uploaded in Adobe_Stocke including a filigrane/signature ?
No watermarks are permitted. Your image will get rejected for non compliance. Adobe will put their watermark on your accepted images to protect them from misuse.
Files may be considered noncompliant due to watermarks, inappropriate or irrelevant keywords or titles, or questionable or defamatory content. Also, if you get a reminder to provide or resolve a problem with a release and you resubmit the file without addressing the issue, we’ll reject it as noncompliant.