A signed amendment to an existing will rather than a full replacement.
In Islamic law
A wasiyyah may be revised at any time while the person retains capacity; no particular form is required.
In Canadian law
A codicil must be executed with the same formality as a will. It is now often simpler to make a fresh will, since a codicil separated from its parent document creates exactly the sort of gap that leads to litigation.
No significant difference between the four Sunni schools is recorded on this point in the sources reviewed. Where a specific case turns on it, ask a qualified scholar rather than relying on a general summary.
Canadian legal detail
Treadstone Law, an Ontario firm with a wills and estates practice, covers the Canadian side of this in more depth:
- Forged or fraudulent will ontario what to do
- Can i write my own will in ontario
- Naming step parent guardian in will ontario
This entry is general information, not legal or religious advice. Inheritance turns on the exact family circumstances. Confirm Canadian law with a lawyer in your province, and any religious ruling with a qualified scholar.