diff --git a/conservancy_beancount/plugin/meta_rt_links.py b/conservancy_beancount/plugin/meta_rt_links.py
index 591e7c0342196d21c0d1c1fd68a8ac54f3b4e5a2..b91f4ec45a4a70d18fa149c08fc4a9044dd9cc57 100644
--- a/conservancy_beancount/plugin/meta_rt_links.py
+++ b/conservancy_beancount/plugin/meta_rt_links.py
@@ -21,11 +21,13 @@ from .. import errors as errormod
 from ..beancount_types import (
     MetaKey,
     MetaValue,
+    Posting,
     Transaction,
 )
 
 from typing import (
-    Mapping,
+    MutableMapping,
+    Optional,
 )
 
 class MetaRTLinks(core.TransactionHook):
@@ -39,19 +41,26 @@ class MetaRTLinks(core.TransactionHook):
         self.rt = rt_wrapper
 
     def _check_links(self,
+                     meta: MutableMapping[MetaKey, MetaValue],
                      txn: Transaction,
-                     meta: Mapping[MetaKey, MetaValue],
+                     post: Optional[Posting]=None,
     ) -> errormod.Iter:
-        for key in self.LINK_METADATA.intersection(meta):
-            for link in str(meta[key]).split():
-                if not link.startswith('rt:'):
-                    continue
-                parsed = self.rt.parse(link)
-                if parsed is None or not self.rt.exists(*parsed):
-                    yield errormod.BrokenRTLinkError(txn, key, link, parsed)
+        metadata = data.Metadata(meta)
+        for key in self.LINK_METADATA:
+            try:
+                links = metadata.get_links(key)
+            except TypeError:
+                yield errormod.InvalidMetadataError(txn, key, meta[key], post)
+            else:
+                for link in links:
+                    if not link.startswith('rt:'):
+                        continue
+                    parsed = self.rt.parse(link)
+                    if parsed is None or not self.rt.exists(*parsed):
+                        yield errormod.BrokenRTLinkError(txn, key, link, parsed)
 
     def run(self, txn: Transaction) -> errormod.Iter:
-        yield from self._check_links(txn, txn.meta)
+        yield from self._check_links(txn.meta, txn)
         for post in txn.postings:
             if post.meta is not None:
-                yield from self._check_links(txn, post.meta)
+                yield from self._check_links(post.meta, txn, post)