It seems that people with bad credit are searching for tricks to raise credit scores fast. The truth is there are ways to improve your credit but there are no ways to simply trick the credit companies into increasing your score.
The best way to increase your fico score is to remove old negative information and add new positive information to your report. This is accomplished through a variety of ways that are listed below.
Ways Improve Your Credit Score
Wait It Out- If you can all your negative marks on your credit report will be removed in 7-10 years. In reality how ever most people cannot wait that long and need more immediate solutions to fix their problems.
Pay For Credit repair- There are companies that will attempt to repair your credit report for you. Most of these companies will charge a large up front fee or monthly installments. The results vary widely from company to company and because most charge by the month they will intentionally drag the process out to maximize their profits.
Self Credit Repair- This is probably the most effective and beneficial way for you to improve your fico scores. With self credit fixing you will be doing exactly what any company that charges a fee will do. If you are unsure of how to do this you can easily go online and find a good book or kit that will give you all the information that you need to be successful.

writing letters is the best thing you can do, all you have to do is pay for postage and delivery confirmation.

I was able to get three items removed by disputing the amount owed.

I think the best trick to raise credit score would be to not miss payments and stay out of to much debt.