how long must you know someone to countersign a passport
Forms-what the countersignatory must do. After youâve filled in the form, you must ask your countersignatory to check the details on the form are correct and sign it. By doing this, they are confirming that: 1  theyâve known you for more than 2 years.f the form is for a child passport, the countersignatory should know the person who signs the declaration rather than the child. The countersignatory must also provide their British or Irish passport number -. may check their identity.