A widow is addressed as Mrs., unless she provides another preference.
If you do not know if the woman is single; married or widowed then you can use 'Ms.' If you know they are single then use 'Miss' or 'Ms.' and 'Mrs.' for married women or widowed women.
Ms., Miss, Mr., and Mrs. are all honorific abbreviations. Ms. can be used for a single or married woman. Miss is reserved for single women who have never been married. Mr. is used for an adult man and Mrs. is used for a married or widowed woman.
Mrs. or Ms.
Use "Mrs." for a divorced or widowed woman who chooses to retain her ex-husband's last name or her late husband's name. "Ms." is appropriate for a divorced or widowed woman who prefers not to disclose her marital status or wishes to be addressed without reference to her former marriage. Ultimately, the choice depends on personal preference, so it’s best to ask the individual which title they prefer.
When addressing a letter to a widowed woman, you can use "Mrs." followed by her late husband's last name, if she prefers that designation, or simply use her first and last name. For example, "Mrs. Jane Smith" or "Jane Smith." If you know she prefers not to use "Mrs." due to her status, you could address her as "Ms." followed by her name. Always consider her personal preference if you're aware of it.
Ms. (pronounced miz) may be used for any woman whether married or single. Mrs. (pronounced misus) is used to refer to a married or formerly married (divorced or widowed) woman in order to specify her marital state. Etiquette does not require either term of address and it is best to use the term a specific woman prefers, if known. If her marital status is unknown then it is best to use Ms. rather than Miss or Mrs.
When addressing a woman, you can use the title Ms. or Mrs. based on her preference.
Mrs -we used when the woman is married; Ms -we use when we do not know whether the woman is married or not, and we do not want to hurt her.
'Mrs' indicates a married woman, 'Ms' does not indicate marital status.
Mrs., the abbreviation for Mistress, is a title for a married woman or a widow. Ms. is a title used for a woman whose marital status is unknown or irrelevant (as in business). The letters Ms. are not an abbreviation of a word, they are an amalgamation drawn from the letters of Miss and Mrs.
divorced woman is a Ms. Once the divorce is executed, the women in no longer a Mrs.
In an email, it is generally appropriate to address a woman as "Ms." unless you know for certain that she prefers to be addressed as "Mrs."