Indecision

I'd send it yourself if was me. It's personal and probably financial information.

@Rogue what if sending it myself causes a feud because the in-laws can't fathom the insistence of doing so myself?

I would explain that it is nothing against them but due to personal information you feel it is best to send it yourself. Also you want to put your best foot forward with your future employer so sending the packet yourself gives a better impression.

Then your in-laws have boundary issues and you need to nip that in the bud NOW. If they can't comprehend that you don't want someone else handling sensitive personal information, they're the ones with the problem. You could lie, and say that the employer said they have to be sent from you directly (if that makes sense under the circumstances), but you still need to work on building the confidence to set and hold boundaries or they will stomp all over them when the baby arrives.

"@Audrey, I already have kids. The thing is, I'm planning on migrating to Finland on a visa sponsorship. My in-law has been living there for decades, and given how difficult it may be to land job opportunities, that's why she chose to help by sending them herself. So, how the in-laws would see it is that they are only trying to help and we are throwing it back in their faces, which may pose a big risk for me in landing the job. It's really a pickle!

It’s your personal info! Your career! Is your sister-in-law an employee at the company or is she helping you get the job? If not, then thank her for her consideration and let them know you and your husband can handle it. If she’s helping you get the interview or involved with the company you’re applying to then that’s a different scenario. Boundaries are everything!