Generally speaking, it is safe to use local retailers or office service stores to print personal information, but it is never a guarantee. You could get a disgruntled or distrustful employee, but many stores have security cameras to help protect the customers and the employees. Aside from employee relations, These places use shredding services for their business paperwork and other identifiable paperwork, including misprints or extra pages printed for the consumer. Many office stores or printing companies also have a shredder by the printer that they'll use for bad printouts and such. Lastly, you potentially risk a customer looking over your shoulder when in a retail space. In any case, it is always best to remain at the printing station until you receive your papers (if you can).