gifts from people who are not invited to the wedding...

That would make me feel awkward as well. Do you know if she is anticipating an invite? I can't imagine how uncomfortable that was for you FH.

That would make me comfortable as well. However, she has given the money. Send a thank you card. And have FH follow-up with a verbal thank you.

I agree it's different with co-workers. It sounds like they won't be happy until you take it, so take it and send a really thoughtful thank you card.

A lot of times, co workers will throw you a "work shower." In this instance, the co workers are not usually invited to the wedding. It's perfectly acceptable to accept their gifts. IMHO, I would definitely not contribute to anyone's wedding I wasn't invited to, but some people are alot nicer than me It's perfectly okay to accept the gift. Just be sure to send a thank you note!!

That's so weird that she gave him cash without a card...

This is so weird.

Some people like to give presents. I would just accept it then send her a very nice thank you card.

Yea, that is a weird situation . Does she think they have a close relationship and she's for sure invited to the wedding?

It's just so awkward! They've been working together for less than a year and they don't even work the same shift. Their shifts overlap for about an hour and that's the only time she sees him. If it was in a card and closer to the wedding, it wouldn't be so weird for me. FH was telling me more about it and he said that the woman said that this money was for us to use towards the wedding and she would be giving a gift closer to the wedding. Also super awkward that basically a stranger is giving me money to pay for my wedding. Apparently she is Polish and her daughter got married recently and had a huge Polish wedding so she knows how expensive weddings are and she wanted to contribute. I plan on writing her a really nice thank you card, but is there any way to politely tell her she's given enough and not to give any more. Not that it will help necessarily, but it's worth a try if I can do it without sounding rude or ungrateful.

Just send a very grateful thank you card. It will sound rude if you put anything about the money she "promised" him.

I do think its weird but some people really like to give. My FH boss who he had only worked for a few months gave us a very nice christmas gift. I felt super weird about it but it is what it is.

I didn't want to say anything about money she promised him. I was just kind of wondering if there was a nice way to say that the gift was very generous and kind of imply that it was already too much in hopes she would reconsider not giving any more.

I feel like if she's anticipating an invite she would save her gift for the wedding day. Maybe she's just that type of person. I would feel awkward accepting it, but it doesn't seem like she's going to stop.

"is there any way to politely tell her she's given enough and not to give any more."

No there is not. She wont take a hint from a thank you card if she wont listen to your fh in person lol. Sorry I didnt make my answer very clear

I sent a wedding gift to a sibling of one of my In-laws and I didn't expect to be invited to the wedding, it never bothered me.

It was just a way of sending them best wishes.

Maybe she doesn't have kids to give help to their weddings or something.

You said there was no stopping her, so I just take it and say thank you. If it really bothers you, maybe make a donation to a charity or something.

Ummm...Is it just me or does this lady sound like she's not too right in the head? Lol. (Meaning the co-worker, not the OP lol)

Take it and say Thank You. You may be surprised to know that an invited guest may not even give you $100 in a card. Sad but true

It must be awkward and very uncomfortable.

Just send a very nice thank you card/note and perhaps he can buy her lunch one day.

You smile and say thank you. You and your FH graciously accept the gift and write her a very nice thank you note. Weird or not, it's something she wants to do.

Send a thank you card.. Some people enjoy Gifting, I know I do. ETA: Finished reading all the comments, she is Polish, many Europeans are this way (my family definitely is). They are also very hospitable people. Being invited or not it doesn't matter, she just wanted to wish you well.