There are need some basic requirements that apply to almost all of these deals. You need to be at least 18 years old, a citizen of the country you are applying in, and you need to be employed. You also can not be in the middle of bankruptcy proceedings, if things have already been discharged or dismissed you are OK.
Moreover it may be possible that you may have a bad credit score. in spit of you dont need to worry about that .lenders always welcome applications and be interested to approved them. A guaranteed unsecured personal loan will have a higher interest rate and probably other fees that will make it so you aren't eligible to borrow as much as you would be otherwise.
First of all, get a copy of your credit report and do correct any mistakes that you can. You can wait six months to a year and try to improve your credit before applying for any financing by getting a secured credit card and paying everything on time. This will greatly improve your options.
You can also offer the lender more of a guarantee that they will be paid back. You can do this by finding someone with better credit to cosign, or by offering some form of collateral like real estate, a vehicle, jewelry, or other collectibles of value this option will take a little longer to go through, however.
Whatever you decide to do, be sure to shop around! I recommend finding five companies to compare rates and find the best guaranteed unsecured personal loan.