Loan agreements, like any contract, reflect an "offer," the "acceptance of the offer," "consideration," and can only involve situations that are "legal" (a term loan agreement involving heroin drug sales is not "legal"). Loan agreements are documented via their commitment letters, agreements that reflect the understandings reached between the involved parties, a promissory note, and a collateral agreement (such as a mortgage or a personal guarantee). Loan agreements offered by regulated banks are different from those that are offered by finance companies in that banks receive a "banking charter" granted as a privilege and involving the "public trust."
There are many financial institutions that offer private student loans with bad credit. The only fuss in the deal is the requirements of the financial institutions. Most entities that I know of providing this service would require a Co-borrower or a Co-Signer. This means as a student you and your parents would need to sign on the loan agreement agreeing to repay the loan.
Deferred payments are usually placed at the end of the loan and payment terms extended. The type of loan is a contributing factor as to how many payments can be skipped. On average, lenders allow borrowers two to three months to resolve financial setbacks.
Private student Loans is another alternative that comes into force rescuing students who have a bad credit history. I have heard of many cases where students apply for loans as a supplement with their Stafford or Perkins loans. In other cases, I have seen people applying for student loans with private organizations when their Stafford loan amount comes to an end.