She may properly still addressed as Mrs Thodore Hastings, Mrs Margaret Hastings, or Ms Margaret Hastings. Ask her or a close friend or relative of hers if she has expressed a preference.
Yes, it is proper to address a widow by her last married name.
Use the prefix of Mrs. if it is a fomal letter. If not, and you are familiar with them, use their first name.
No, a widow generally remains as "Mrs".
It is always a sensitive situation when you need to address a widow. In order to show her respect you can address her as Ms.
Do NOT, repeat NOT, use the widow's first name. You address the envelope just as though the husband were still alive. Example: Mrs. Robert Smith While that is the formal way address, in today's society, many women prefer to be addressed with their own first name. Neither is considered incorrect.
The proper title for a widow is "Mrs." followed by her deceased husband's first and last name. Alternatively, she may choose to keep using her married name if she prefers.
Mrs is used to address a widow.
A Widow.
what is the proper way to address the mayor
The woman is a widow.
Like the words mom, dad, uncle, etc, wife would be capitalized if it is used as a proper noun, like a name. If it is not a proper noun, it is not capitalized. For example, "Wife, bring me my slippers" vs "I would like my wife to bring me my slippers"
You can address the envelope to a widow as: Mrs. Jane Doe (Doe would be her husbands surname) or, you could write Mrs. J. Doe on the envelope. Even though she is a widow she still has the surname of her husband until she either decides to change it to her maiden name or remarries.