diff --git a/src/main/kotlin/model/Library.kt b/src/main/kotlin/model/Library.kt
index f95429d..e45a3e9 100644
--- a/src/main/kotlin/model/Library.kt
+++ b/src/main/kotlin/model/Library.kt
@@ -8,3 +8,10 @@ data class Library(
     val name: String,
     val address: String,
 )
+
+@Serializable
+data class NewLibrary(
+    // ID to be inserted by Database
+    val name: String,
+    val address: String,
+)
diff --git a/src/main/kotlin/model/Patron.kt b/src/main/kotlin/model/Patron.kt
index d058a60..154f15a 100644
--- a/src/main/kotlin/model/Patron.kt
+++ b/src/main/kotlin/model/Patron.kt
@@ -12,3 +12,14 @@ data class Patron(
     val lastLogin: String?,
     val password: String?,
 )
+
+@Serializable
+data class NewPatron(
+    // ID to be inserted by Database
+    val name: String,
+    val hasGoodStanding: Boolean,
+    val feeTotal: Long,
+    val isArchived: Boolean,
+    val lastLogin: String?,
+    val password: String?,
+)
diff --git a/src/main/kotlin/model/Staff.kt b/src/main/kotlin/model/Staff.kt
index c889c11..32ab199 100644
--- a/src/main/kotlin/model/Staff.kt
+++ b/src/main/kotlin/model/Staff.kt
@@ -9,3 +9,11 @@ data class Staff(
     val password: String?,
     val isArchived: Boolean,
 )
+
+@Serializable
+data class NewStaff(
+    // ID to be inserted by Database
+    val name: String,
+    val password: String?,
+    val isArchived: Boolean,
+)