diff --git a/backend/Cargo.lock b/backend/Cargo.lock
index 9432a5c..1022bdd 100644
--- a/backend/Cargo.lock
+++ b/backend/Cargo.lock
@@ -1970,6 +1970,7 @@ dependencies = [
  "atoi",
  "byteorder",
  "bytes",
+ "chrono",
  "crc",
  "crossbeam-queue",
  "dotenvy",
@@ -2034,6 +2035,7 @@ dependencies = [
  "sha2",
  "sqlx-core",
  "sqlx-mysql",
+ "sqlx-postgres",
  "sqlx-sqlite",
  "syn 1.0.109",
  "tempfile",
@@ -2052,6 +2054,7 @@ dependencies = [
  "bitflags 2.4.0",
  "byteorder",
  "bytes",
+ "chrono",
  "crc",
  "digest",
  "dotenvy",
@@ -2093,6 +2096,7 @@ dependencies = [
  "base64",
  "bitflags 2.4.0",
  "byteorder",
+ "chrono",
  "crc",
  "dotenvy",
  "etcetera",
@@ -2129,6 +2133,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "be4c21bf34c7cae5b283efb3ac1bcc7670df7561124dc2f8bdc0b59be40f79a2"
 dependencies = [
  "atoi",
+ "chrono",
  "flume",
  "futures-channel",
  "futures-core",
diff --git a/backend/Cargo.toml b/backend/Cargo.toml
index d32e31d..ba7169a 100644
--- a/backend/Cargo.toml
+++ b/backend/Cargo.toml
@@ -8,7 +8,7 @@ edition = "2021"
 [dependencies]
 reqwest = { version = "0.11", features = ["json"] }
 rocket = { version = "=0.5.0-rc.3" , features = ["json", "msgpack", "uuid"] }
-sqlx = { version = "0.7.1", features = [ "runtime-tokio", "tls-rustls", "mysql", "macros" ] }
+sqlx = { version = "0.7.1", features = [ "runtime-tokio", "tls-rustls", "mysql", "macros", "chrono" ] }
 once_cell = "1.18.0"
 dotenvy = "0.15.7"
 serde = "1.0.188"
diff --git a/backend/src/controller/register/mod.rs b/backend/src/controller/register/mod.rs
index af85167..03eaaa1 100644
--- a/backend/src/controller/register/mod.rs
+++ b/backend/src/controller/register/mod.rs
@@ -22,28 +22,15 @@ pub async fn insert_all(data: Json<Vec<RegisterCreate>>) -> Status {
 }
 
 #[get("/register/<dni>")]
-pub async fn get_by_dni(dni: i32) -> Json<Vec<Register>> {
-    let r1 = Register {
-        register_id: 1,
-        register_code: 322,
-        register_creation_date: "2021-01-01".to_string(),
-        register_display_date: "2021-01-01".to_string(),
-        register_custom_label: "".to_string(),
-        register_person_id: 1,
-        register_course_id: 1,
-        register_is_preview: false,
-    };
+pub async fn get_by_dni(dni: i32) -> (Status, Json<Vec<Register>>) {
+    let registers = Register::get_by_dni(dni).await;
 
-    let r2 = Register {
-        register_id: 2,
-        register_code: 323,
-        register_creation_date: "2021-01-01".to_string(),
-        register_display_date: "2021-01-03".to_string(),
-        register_custom_label: "".to_string(),
-        register_person_id: 1,
-        register_course_id: 2,
-        register_is_preview: false,
-    };
+    match registers {
+        Ok(data) => (Status::Ok, Json(data)),
+        Err(err) => {
+            eprintln!("{:?}", err);
 
-    Json(vec![r1, r2])
+            (Status::InternalServerError, Json(vec![]))
+        }
+    }
 }
diff --git a/backend/src/model/register.rs b/backend/src/model/register.rs
index 21e18bc..5621b87 100644
--- a/backend/src/model/register.rs
+++ b/backend/src/model/register.rs
@@ -109,3 +109,28 @@ impl RegisterCreate {
         Ok(new_max)
     }
 }
+
+impl Register {
+    pub async fn get_by_dni(dni: i32) -> Result<Vec<Register>, sqlx::Error> {
+        let db = db();
+
+        let res = sqlx::query!("SELECT * FROM register 
+                WHERE register_person_id = (SELECT person_id FROM person WHERE person_dni = ?)", dni)
+            .fetch_all(db)
+            .await?
+            .into_iter()
+            .map(|r| Register {
+                register_id: r.register_id,
+                register_code: r.register_code,
+                register_creation_date: r.register_creation_date.format("%Y-%m-%d").to_string(),
+                register_display_date: r.register_display_date.format("%Y-%m-%d").to_string(),
+                register_custom_label: r.register_custom_label,
+                register_is_preview: r.register_is_preview == 1,
+                register_person_id: r.register_person_id,
+                register_course_id: r.register_course_id,
+            })
+            .collect();
+
+        Ok(res)
+    }
+}
diff --git a/frontend/src/certs/NewRegister/RegisterPreview.tsx b/frontend/src/certs/NewRegister/RegisterPreview.tsx
index 8b0f439..c32066d 100644
--- a/frontend/src/certs/NewRegister/RegisterPreview.tsx
+++ b/frontend/src/certs/NewRegister/RegisterPreview.tsx
@@ -12,8 +12,6 @@ function isoDateToLocalDate(date: string): string {
 
 export function RegisterPreview(props: {selections: Array<[number, string]>, personId: number | null, onDelete: (v: number) => void, onRegister: () => void}) {
     const submit = async() => {
-        console.log("Submit...");
-
         const registers: RegisterBatchCreate = props.selections.map(([courseId, date]) => ({
             person_id: props.personId!,
             course_id: courseId,
diff --git a/frontend/src/certs/index.tsx b/frontend/src/certs/index.tsx
index b9410fe..f867b0b 100644
--- a/frontend/src/certs/index.tsx
+++ b/frontend/src/certs/index.tsx
@@ -10,7 +10,7 @@ export function Certs() {
     return (
         <div class="grid grid-cols-[16rem_25rem_1fr]">
             <Search setPerson={setPerson} />
-            <NewRegister personId={0} onSuccess={() => {}} />
+            <NewRegister personId={person()?.person_id ?? -1} onSuccess={() => {}} />
             <Registers person={person()} />
         </div>
     );