Most complaints can be submitted by mail or online. Online complaints take less time and are processed faster than those submitted by mail. You complete the appropriate online form, scan and attach the required documents and choose whether the payment should be sent to the supplier or to you. You will need the date, vendor, diagnosis, cost of treatment, and in some cases, the vendor’s tax ID number. While setting up your account online takes time and effort, electronic filing makes it easier to track your claims and speed up refunds. Plus, you’ll be able to confirm that your complaint has been received, easily report complaints for later review, and submit additional or corrected information more quickly. And, of course, e-filing doesn’t require stamps, envelopes, or going to the post office. If you don’t have a printer or scanner at home, there are several apps that use your smartphone’s camera to make copies of documents or receipts and save them.