diff --git a/src/borg/archive.py b/src/borg/archive.py
index 5907f0be3..418a7072e 100644
--- a/src/borg/archive.py
+++ b/src/borg/archive.py
@@ -336,6 +336,7 @@ class Archive:
         self.name = name  # overwritten later with name from archive metadata
         self.name_in_manifest = name  # can differ from .name later (if borg check fixed duplicate archive names)
         self.comment = None
+        self.tam_verified = False
         self.checkpoint_interval = checkpoint_interval
         self.numeric_owner = numeric_owner
         self.noatime = noatime
@@ -378,7 +379,9 @@ class Archive:
 
     def _load_meta(self, id):
         data = self.key.decrypt(id, self.repository.get(id))
-        metadata = ArchiveItem(internal_dict=msgpack.unpackb(data, unicode_errors='surrogateescape'))
+        # we do not require TAM for archives, otherwise we can not even borg list a repo with old archives.
+        archive, self.tam_verified = self.key.unpack_and_verify_archive(data, force_tam_not_required=True)
+        metadata = ArchiveItem(internal_dict=archive)
         if metadata.version != 1:
             raise Exception('Unknown archive metadata version')
         return metadata
diff --git a/src/borg/crypto/key.py b/src/borg/crypto/key.py
index 782b8a5cb..797e22725 100644
--- a/src/borg/crypto/key.py
+++ b/src/borg/crypto/key.py
@@ -284,7 +284,9 @@ class KeyBase:
         """Unpack msgpacked *data* and return (object, did_verify)."""
         tam_required = self.tam_required
         if force_tam_not_required and tam_required:
-            logger.warning('Archive authentication DISABLED.')
+            # for a long time, borg only checked manifest for "tam_required" and
+            # people might have archives without TAM, so don't be too annoyingly loud here:
+            logger.debug('Archive authentication DISABLED.')
             tam_required = False
         data = bytearray(data)
         unpacker = get_limited_unpacker('archive')
diff --git a/src/borg/helpers.py b/src/borg/helpers.py
index c00563345..e932b951b 100644
--- a/src/borg/helpers.py
+++ b/src/borg/helpers.py
@@ -1815,9 +1815,10 @@ class ArchiveFormatter(BaseFormatter):
         'id': 'internal ID of the archive',
         'hostname': 'hostname of host on which this archive was created',
         'username': 'username of user who created this archive',
+        'tam': 'TAM authentication state of this archive',
     }
     KEY_GROUPS = (
-        ('archive', 'name', 'barchive', 'comment', 'bcomment', 'id'),
+        ('archive', 'name', 'barchive', 'comment', 'bcomment', 'id', 'tam'),
         ('start', 'time', 'end', 'command_line'),
         ('hostname', 'username'),
     )
@@ -1868,6 +1869,7 @@ class ArchiveFormatter(BaseFormatter):
             'bcomment': partial(self.get_meta, 'comment', rs=False),
             'end': self.get_ts_end,
             'command_line': self.get_cmdline,
+            'tam': self.get_tam,
         }
         self.used_call_keys = set(self.call_keys) & self.format_keys
         if self.json:
@@ -1918,6 +1920,9 @@ class ArchiveFormatter(BaseFormatter):
     def get_ts_end(self):
         return self.format_time(self.archive.ts_end)
 
+    def get_tam(self):
+        return 'verified' if self.archive.tam_verified else 'none'
+
     def format_time(self, ts):
         return OutputTimestamp(ts)