<prompt> Human: My parents have apparently found the house of their dreams and are applying for a mortgage loan. Per a professionals advise theyve asked me to co-sign this one with them because of recent events that may impact their chances of being approved. They both have excellent credit and have three properties together and are financially stable, but recent events dad making computer illiterate mom start making mortgage payments on her own via website resulting in two missed payments because she didnt click recurring payment button, and grandma living in one of their properties moving to nursing home thus parents not getting rent for this property for 4 months may hurt their chances. So to ensure their chances of being approved they want me to co-sign. Here are some stats: Parents Age: Late 50s dad has full time job My Age: Late 20s I have full time job 30 year 400K Mortgage Concern: Ive read around and it looks like my only concern is the debt-to-income ratio, for which theyve replied they would in return co-sign with me for any student loans or mortgages in the future if I dont get approved initially. They said my dad co-signing for any future loans with me would greatly increase my chances because he has great credit and history, etc. Plus the tax breaks Id be getting would be a plus. I understand that co-signing with financially unstable family members is not a good idea, but I dont doubt they will pay all payments fine after dad retires he said he will have incoming rent from other properties, his small business, social security, IRA, annuity to pay mortgage if its not paid off by then.Thank you for your advisement.  <response>: As a former underwriter and credit counselor this is the beginning of a lot of nightmare stories. 