- - Contents Verifying U.S. Postal Service Money Orders Follow these steps to cash a Postal Service™ money order: 1. Check that the amount does not exceed the legal limit: $1,000 for domestic, and $700 for..." /> - - Contents Verifying U.S. Postal Service Money Orders Follow these steps to cash a Postal Service™ money order: 1. Check that the amount does not exceed the legal limit: $1,000 for domestic, and $700 for..." />