1. Couples must need your marriage certificate, household registration book, ID card and similar things to get a loan to buy a house.
2. Banks generally require. However, if you have other excellent conditions (such as the real estate license of a house with a good location), you may not need a marriage certificate. Marriage certificate is as necessary as business license and real estate license. Marriage certificate mainly proves the family's repayment ability;
3. it's different. You should ask the bank you borrowed. Every bank is different. They will tell you what to do;
4. I can't get through. I suggest you go directly to the Civil Affairs Bureau and directly reissue your current name on the grounds that your marriage certificate is lost.
Extended data:
Application material
1. Borrower's valid ID card and household registration book;
2. Proof of marital status, unmarried persons need to provide proof of unmarried, and divorced persons need to issue a court civil mediation or divorce certificate (indicating that they have not remarried after divorce);
3. If you are married, you need to provide your spouse's valid ID card, household registration book and marriage certificate;
4. The borrower's income certificate (salary income certificate or tax payment certificate for half a year);
5. Real estate title certificate;
6. Guarantor (ID card, household registration book, marriage certificate, etc. Is required)
References:
Baidu encyclopedia: mortgage