I finally got a word in from DHS about this whole I-9 issue, and here's the outcome (neither totally "favorable" or "unfavorable" for the TG community):
On one hand my goal was not accomplished because I could not manage to get any official word on cases like transgender people on whether they can exclude mentioning their former name or not. On the other hand, it appears that they're more interested in trying to avoid failed verifications because your records may be under different names vs. penalizing people for omitting something irrelevant (like some TGs fear when an employer asks a similar question on a job application, and
I created a post to help us determine when the former vs. latter cases apply here). This is inferred because although they recommend if you haven't had any other legal names to put "N/A" in the field they don't require it (like they do for some other fields that don't apply in the individual's case) - similar to their requirement for your e-mail address or telephone number (asked more for convenience in case issues come up rather than an absolute requirement). Here's a copy-and-paste from the final reply:
QuoteThe only guidance available regarding this situation is the guidance set forth in the Form I-9 Instructions which state to 'Provide all other names used, if any (including maiden name). If you have had no other legal names, write N/A.' Follow the guidance set forth in the Form I-9 Instructions when determining if an N/A is required. The instructions state when an employer or employee may use N/A or must use N/A. Required fields must be completed with either the information requested or N/A. Failing to provide a response in a required field may be considered a verification violation.
N/A is not required but recommended in the Middle Initial, Other Names Used, Apt. Number, E-mail Address and Telephone Number fields on the Form I-9.
Based on all that, here's probably the best way to proceed if you don't want to out yourself: When you fill out and submit the I-9 form, simply leave the "Other Names Used (if any)" field blank (unless you've had another name change post-transition, like if you changed your mind on your name or got married*), or put down an "alternative" response like I suggest for the job application when you have no records under the former name (see the link I mentioned earlier in this post). If someone asks you further, and you have a new/amended birth certificate reflecting your new name (not necessarily your gender, if you
live were born in one of those "backwards" states that won't change that), mention that there was a name change to your BC and all documents that you'd need to present are under that name - usually they wouldn't care at that point.
*Another point is the field is limited in size (the same size as when it just asked for a "maiden name"), and there are no provisions for if you can't fit every name you've used into the field, so it appears that they're mainly interested in what other names your records are or are likely to appear under and not an exhaustive history of your legal name(s). Indeed, unless your former full name was short in length, you might not be able to fit it all in (the field being designed to accommodate a last name or two, since their main concerns are married/divorced women that have not synchronized all their records or have a birth certificate in their maiden name, and those who may have some records under a nickname/shorter form of their first name and others under a longer form or under a mix of their first and middle names if they go primarily by the latter). This may provide another option without outing yourself if you changed your last name when transitioning (mentioning just your former last name, which would probably work excellently for transwomen). Likewise for MTFs if their male first name is also a common last name they could put just that down and it'll probably assumed to be a former last name without question, or any transpeople who may have used a unisex name or nickname at some point.
The main caution is if the employer uses E-Verify and your SSA record is not under your new name and you put that name down as yours, you will face problems (and could possibly be barred from working while the issue is resolved) - which putting down an alternate name the record may be under allows such issues to be solved more quickly.