An internet addict. Depends on who issued it - for an exact date, contact the issuing agency. Red Cross CPR certifications last for 2 years and American Heart Association certifications last for 2 years. Regardless how long the certification is good for, certain standards like NFPA require it annually. Be sure to check your company policy. Best case practice yearly in regards to OSHA training requirements (BBP).
Bank and Cash Records. The Better Business Bureau recommends holding onto bank statements for three years, and Bankrate suggests storing them for at least seven years. Records of bank reconciliation reports need be maintained for only two or three years, and duplicate bank deposit slips should be held for three years.
Tax documents Keep tax returns, as well as supporting documents like W-2 forms, receipts, and real estate closing statements for seven years. The IRS may audit you within three years if it suspects good-faith errors; six years if it believes you underreported your income by at least 25%; and unlimited time if you did not file a return or filed a fraudulent one. Investment records Keep as long as you own the securities, plus another seven years [Rich]. You'll need them to prove capital gains and losses. Bank statements One month. You just need these long enough to check the accuracy of the transactions [Williams]. Unless the statement is your only record for a tax-related transaction, there's no need to keep them longer.