What are the requirements and costs of replacing a social security card? Is that a walk in appointment?

You can also sign up online and request one through website or app. That way you don't have to wait in person.

You can get a certain number of replacement cards, like 8 or 10, before there is a problem.

No cost. And it's a walk in situation but be prepared for long wait times at times. Cards themselves are not issued at the office. You'll get a letter stating you've filed for it but actual card itself takes about 10 to 14 days in mail

What site would you recommend?