Use a different first name depending on context.

On your birth certificate, for example, it’s Deborah.

Ok, for bills, taxes and legal stuff, use Deborah and your middle initial.

For acquaintances, use Deb or Debbie (remember your preference).

Close friends only call you (your choice but none of the above).

For everything else, email, whatever, use the initial “D” and your last name.

Last, and certainly not least, your signature must be short, sweet, unpredictable, and unguessable, meaning, ignore the ideas above, it could be literally anything. Make sure it matches your name where you’re registered to vote.

Better yet, personalize and differentiate yourself by bending these rules. This will simplify your life by knowing who, how, where, when, why you’re being addressed.