Addressing an envelope is more important than many people believe. For mass-letters, such as an invitation that is pre-printed, it indicates who is invited to said event. For more casual mailings, it indicates to whom the letter is mailed. While a letter is only signed to be from one person (though it is common and acceptable to sign all of your family members’ names), a letter is often address to numerous people. For example, a birthday party invitation (pre-printed) would indicate on the envelope everyone invited.
Even when addressing close family members, it is a best practice to formally address the envelope – i.e. Mr., Mrs., etc. For example: Mr. and Mrs. James Evanson.
For addressing children living at home, their magical age for titles is 10. Boys until age 10 are titled as Master. Girls have no title until age 10, at which time they take the title of Miss.
Children do not require last names in the envelope, unless using titles. The exception is when the child’s last name is different from the parents’ last name.
Here is a big misconception (hopefully) cleared up. If a name is not on the envelope, they are no included. Therefore, if a wedding invitation is address to only the couple and not the children, only the couple is invited.
When addressing an envelope to a married couple who have the same name not using titles, the woman’s name actually comes first. There is an old adage of ‘never separate a man from his name.’ For example: Emily and Garrett Glass. Alternatively with titles is would be Mr. and Mrs. Garrett Glass.
Knowing how to address an envelope can help ensure the intended recipients are included. Bringing back the art of the handwritten letter can also help promote this trick!
Please let me know any questions you may have! As always, thank you for reading!