<prompt> Human: I wouldnt even give her the actual card. Id have it mailed to my house and put it in my safe. Will this improve her credit? And will her credit history effect mine in any way?Also, my fiance and I have pretty good credit 740-760.. we will be opening the credit card together, so does that many people on one account make a difference for any of us?Thanks for taking the time to answer : You all are always really helpful.Edit: You guys are all awesome! I always learn so much from this sub, and I can ask questions more specific to my individual situation. Thank you my fabulous gurus.. with your help, I will soon be one of you! Thank you to all who responded! UPDATE: After getting so many responses, and some varied opinions, I think I am going to gather a list of questions to ask my bank based of what Ive been told here. Ill make a decision from there. Right now Im leaning more to helping her pay the credit card debt she already has I believe she has a WalMart store card that is in bad shape, maybe I can help her come to a settlement with them, then rethinking linking myself in that way with her in the future. Still deciding if Im going to start a brand new joint Chase Freedom with the fiance 200 bonus would pay for a few things for the wedding, even though I recently got a Discover IT card that I could add him to.Thanks for everything rpersonalfinance! You rock.  <response>: How are you going to stop her from calling and getting a new card mailed to her home address? 