diff --git a/96.md b/96.md
index be709991..301031f4 100644
--- a/96.md
+++ b/96.md
@@ -84,7 +84,9 @@ See https://github.com/aljazceru/awesome-nostr#nip-96-file-storage-servers.
 
 ## Auth
 
-When indicated, `clients` must add an [NIP-98](98.md) `Authorization` header (**optionally** with the encoded `payload` tag set to the base64-encoded 256-bit SHA-256 hash of the file - not the hash of the whole request body).
+When indicated, `clients` must add an [NIP-98](98.md) `Authorization` header.
+The NIP-98 event can **optionally** include the encoded `payload` tag set to the hex-encoded 256-bit SHA-256 hash of the file - not the hash of the whole request body.
+The event may include multiple `u` tags to make it possible to reuse the same header for different servers.
 
 ## Upload
 
@@ -94,7 +96,7 @@ When indicated, `clients` must add an [NIP-98](98.md) `Authorization` header (**
 
 List of form fields:
 
-- `file`: **REQUIRED** the file to upload
+- `file`: **REQUIRED** the file to upload. It should be the last form field;
 - `caption`: **RECOMMENDED** loose description;
 - `expiration`: UNIX timestamp in seconds. Empty string if file should be stored forever. The server isn't required to honor this.
 - `size`: File byte size. This is just a value the server can use to reject early if the file size exceeds the server limits.