What address is cyfeiriad dychwelyd mail receipt section

I think you're asking about the "Return Address" section in the "Mail Receipt" section of a Cyfeiriad (which is Welsh for "Address").

In the "Return Address" section, you would typically enter the address where you would like to receive any returned mail or packages. This is usually the same as your own address, but it can be different if you want to receive mail at a different location.

Here's an example of what the "Return Address" section might look like:

Return Address: [Your Name] [Your Street Address] [Your City, State, ZIP] [Your Country]

For example:

Return Address: John Smith 123 Main Street Anytown, CA 12345 USA

Please note that the exact format and requirements for the "Return Address" section may vary depending on the specific form or document you are using.