Complete amounts, dates, parties, subject matter and attachments before signing. Close unused spaces and record amendments with clear approval from both parties; an assurance that agreed details will be added later is inadequate protection.
Obtain an identical final copy immediately and retain its delivery and acceptance history. If another person will complete a form, define the permitted information and limits of their authority in advance in a way that can be evidenced.
If misuse occurs, keep earlier and later versions, messages explaining the permission and the original instrument. Authenticity of a signature and consent to the completed wording are related but different issues requiring the appropriate evidential or challenge procedure.
A practical next step
Wait for completed wording and a final copy before signing; if you already signed in blank, document the permission and the document’s current status.
Official sources
Adapted from a photo post shared on Dr. Bahrami’s Instagram and checked against official sources. This page provides the updated guidance.
Original Instagram post