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Is it still possible to piggyback? I have a family memeber who rebuilded her credit by piggybacking about 6 years ago from another family member now she is with excellent credit. She just co-signed last year for the person who helped her from piggybacking.
Sometimes it does, other times, not so much. Many lenders will exclude AU accounts from their decisions, others won't. If it's a good account, good history and low util, it certainly wouldn't hurt.
Still works (for the most part). Did this for my brat, and now she has better cards than me.