diff --git a/ratelimits/bucket.go b/ratelimits/bucket.go
index 33228ff6e930..75b54fa05a31 100644
--- a/ratelimits/bucket.go
+++ b/ratelimits/bucket.go
@@ -235,9 +235,10 @@ func (builder *TransactionBuilder) OrdersPerAccountTransaction(regId int64) (Tra
 	return newTransaction(limit, bucketKey, 1)
 }
 
-// FailedAuthorizationsPerDomainPerAccountCheckOnlyTransactions returns a slice of
-// Transactions for the provided order domain names. An error is returned if any
-// of the order domain names are invalid.
+// FailedAuthorizationsPerDomainPerAccountCheckOnlyTransactions returns a slice
+// of Transactions for the provided order domain names. An error is returned if
+// any of the order domain names are invalid. This method should be used for
+// checking capacity, before allowing more authorizations to be created.
 func (builder *TransactionBuilder) FailedAuthorizationsPerDomainPerAccountCheckOnlyTransactions(regId int64, orderDomains []string, maxNames int) ([]Transaction, error) {
 	if len(orderDomains) > maxNames {
 		return nil, fmt.Errorf("order contains more than %d DNS names", maxNames)
@@ -273,6 +274,10 @@ func (builder *TransactionBuilder) FailedAuthorizationsPerDomainPerAccountCheckO
 	return txns, nil
 }
 
+// FailedAuthorizationsPerDomainPerAccountSpendOnlyTransactions returns a slice
+// of Transactions for the provided order domain names. An error is returned if
+// any of the order domain names are invalid. This method should be used for
+// spending capacity, as a result of a failed authorization.
 func (builder *TransactionBuilder) FailedAuthorizationsPerDomainPerAccountSpendOnlyTransactions(regId int64, orderDomains []string, maxNames int) ([]Transaction, error) {
 	if len(orderDomains) > maxNames {
 		return nil, fmt.Errorf("order contains more than %d DNS names", maxNames)