diff --git a/mod/item.php b/mod/item.php
index 122f62c4e5..b126c4825b 100644
--- a/mod/item.php
+++ b/mod/item.php
@@ -1127,4 +1127,4 @@ function item_add_implicit_mentions(array $tags, array $thread_parent_contact, $
 	}
 
 	return $tags;
-}
\ No newline at end of file
+}
diff --git a/src/Database/DBA.php b/src/Database/DBA.php
index 326fb0771d..832f0a444f 100644
--- a/src/Database/DBA.php
+++ b/src/Database/DBA.php
@@ -425,7 +425,7 @@ class DBA
 
 		if ((substr_count($sql, '?') != count($args)) && (count($args) > 0)) {
 			// Question: Should we continue or stop the query here?
-			Logger::error('Parameter mismatch. Query "'.$sql.'" - Parameters '.print_r($args, true));
+			Logger::warning('Query parameters mismatch.', ['query' => $sql, 'args' => $args, 'callstack' => System::callstack()]);
 		}
 
 		$sql = self::cleanQuery($sql);
diff --git a/src/Model/Item.php b/src/Model/Item.php
index e4d18c9a74..16a3b07b53 100644
--- a/src/Model/Item.php
+++ b/src/Model/Item.php
@@ -1336,7 +1336,11 @@ class Item extends BaseObject
 			$expire_date = time() - ($expire_interval * 86400);
 			$created_date = strtotime($item['created']);
 			if ($created_date < $expire_date) {
-				Logger::notice('item-store: item created ('.date('c', $created_date).') before expiration time ('.date('c', $expire_date).'). ignored. ' . print_r($item,true));
+				Logger::notice('Item created before expiration interval.', [
+					'created' => date('c', $created_date),
+					'expired' => date('c', $expire_date),
+					'$item' => $item
+				]);
 				return 0;
 			}
 		}
@@ -1354,7 +1358,13 @@ class Item extends BaseObject
 			if (DBA::isResult($existing)) {
 				// We only log the entries with a different user id than 0. Otherwise we would have too many false positives
 				if ($uid != 0) {
-					Logger::notice("Item with uri ".$item['uri']." already existed for user ".$uid." with id ".$existing["id"]." target network ".$existing["network"]." - new network: ".$item['network']);
+					Logger::notice('Item already existed for user', [
+						'uri' => $item['uri'],
+						'uid' => $uid,
+						'network' => $item['network'],
+						'existing_id' => $existing["id"],
+						'existing_network' => $existing["network"]
+					]);
 				}
 
 				return $existing["id"];
@@ -1432,7 +1442,7 @@ class Item extends BaseObject
 		$item['author-id'] = defaults($item, 'author-id', Contact::getIdForURL($item["author-link"], 0, false, $default));
 
 		if (Contact::isBlocked($item["author-id"])) {
-			Logger::notice('Contact '.$item["author-id"].' is blocked, item '.$item["uri"].' will not be stored');
+			Logger::notice('Author is blocked node-wide', ['author-link' => $item["author-link"], 'item-uri' => $item["uri"]]);
 			return 0;
 		}
 
@@ -1442,21 +1452,27 @@ class Item extends BaseObject
 		$item['owner-id'] = defaults($item, 'owner-id', Contact::getIdForURL($item["owner-link"], 0, false, $default));
 
 		if (Contact::isBlocked($item["owner-id"])) {
-			Logger::notice('Contact '.$item["owner-id"].' is blocked, item '.$item["uri"].' will not be stored');
+			Logger::notice('Owner is blocked node-wide', ['owner-link' => $item["owner-link"], 'item-uri' => $item["uri"]]);
 			return 0;
 		}
 
 		if ($item['network'] == Protocol::PHANTOM) {
-			Logger::notice('Missing network. Called by: '.System::callstack(), Logger::DEBUG);
-
 			$item['network'] = Protocol::DFRN;
-			Logger::notice("Set network to " . $item["network"] . " for " . $item["uri"], Logger::DEBUG);
+			Logger::notice('Missing network, setting to {network}.', [
+				'uri' => $item["uri"],
+				'network' => $item['network'],
+				'callstack' => System::callstack()
+			]);
 		}
 
 		// Checking if there is already an item with the same guid
 		$condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
 		if (self::exists($condition)) {
-			Logger::notice('Found already existing item with guid '.$item['guid'].' for user '.$item['uid'].' on network '.$item['network']);
+			Logger::notice('Found already existing item', [
+				'guid' => $item['guid'],
+				'uid' => $item['uid'],
+				'network' => $item['network']
+			]);
 			return 0;
 		}
 
diff --git a/src/Model/Term.php b/src/Model/Term.php
index 5266627aca..36876368df 100644
--- a/src/Model/Term.php
+++ b/src/Model/Term.php
@@ -204,6 +204,8 @@ class Term
 				$type = self::HASHTAG;
 				$term = $tag;
 				$link = '';
+
+				Logger::notice('Unknown term type', ['tag' => $tag]);
 			}
 
 			if (DBA::exists('term', ['uid' => $item['uid'], 'otype' => self::OBJECT_TYPE_POST, 'oid' => $item_id, 'term' => $term, 'type' => $type])) {
diff --git a/src/Protocol/ActivityPub/Processor.php b/src/Protocol/ActivityPub/Processor.php
index b77df1fae8..2661444e0c 100644
--- a/src/Protocol/ActivityPub/Processor.php
+++ b/src/Protocol/ActivityPub/Processor.php
@@ -276,7 +276,7 @@ class Processor
 		/// @todo What to do with $activity['context']?
 
 		if (($item['gravity'] != GRAVITY_PARENT) && !Item::exists(['uri' => $item['thr-parent']])) {
-			Logger::log('Parent ' . $item['thr-parent'] . ' not found, message will be discarded.', Logger::DEBUG);
+			Logger::info('Parent not found, message will be discarded.', ['thr-parent' => $item['thr-parent']]);
 			return;
 		}