fix: minor improvements and tests
diff --git a/erpnext/loan_management/doctype/loan/loan.json b/erpnext/loan_management/doctype/loan/loan.json
index acf09f5..4f8ceb0 100644
--- a/erpnext/loan_management/doctype/loan/loan.json
+++ b/erpnext/loan_management/doctype/loan/loan.json
@@ -23,6 +23,7 @@
   "rate_of_interest",
   "is_secured_loan",
   "disbursement_date",
+  "closure_date",
   "disbursed_amount",
   "column_break_11",
   "maximum_loan_amount",
@@ -348,12 +349,18 @@
    "no_copy": 1,
    "options": "Company:company:default_currency",
    "read_only": 1
+  },
+  {
+   "fieldname": "closure_date",
+   "fieldtype": "Date",
+   "label": "Closure Date",
+   "read_only": 1
   }
  ],
  "index_web_pages_for_search": 1,
  "is_submittable": 1,
  "links": [],
- "modified": "2020-11-24 12:27:23.208240",
+ "modified": "2021-04-10 09:28:21.946972",
  "modified_by": "Administrator",
  "module": "Loan Management",
  "name": "Loan",
diff --git a/erpnext/loan_management/doctype/loan/test_loan.py b/erpnext/loan_management/doctype/loan/test_loan.py
index 57f9886..6f8da31 100644
--- a/erpnext/loan_management/doctype/loan/test_loan.py
+++ b/erpnext/loan_management/doctype/loan/test_loan.py
@@ -523,7 +523,7 @@
 		self.assertEqual(flt(repayment_entry.total_interest_paid, 0), flt(interest_amount, 0))
 
 	def test_penalty(self):
-		loan = create_loan_scenario_for_penalty(self)
+		loan, amounts = create_loan_scenario_for_penalty(self)
 		# 30 days - grace period
 		penalty_days = 30 - 4
 		penalty_applicable_amount = flt(amounts['interest_amount']/2)
@@ -537,7 +537,7 @@
 		self.assertEquals(calculated_penalty_amount, penalty_amount)
 
 	def test_penalty_repayment(self):
-		loan = create_loan_scenario_for_penalty(self)
+		loan, dummy = create_loan_scenario_for_penalty(self)
 		amounts = calculate_amounts(loan.name, '2019-11-30 00:00:00')
 
 		first_penalty = 10000
@@ -670,7 +670,7 @@
 
 	repayment_entry.submit()
 
-	return loan
+	return loan, amounts
 
 def create_loan_accounts():
 	if not frappe.db.exists("Account", "Loans and Advances (Assets) - _TC"):
diff --git a/erpnext/loan_management/doctype/loan_disbursement/loan_disbursement.json b/erpnext/loan_management/doctype/loan_disbursement/loan_disbursement.json
index cd5df4d..662c626 100644
--- a/erpnext/loan_management/doctype/loan_disbursement/loan_disbursement.json
+++ b/erpnext/loan_management/doctype/loan_disbursement/loan_disbursement.json
@@ -20,6 +20,10 @@
   "cost_center",
   "customer_details_section",
   "bank_account",
+  "disbursement_references_section",
+  "reference_date",
+  "column_break_17",
+  "reference_number",
   "amended_from"
  ],
  "fields": [
@@ -126,12 +130,31 @@
   {
    "fieldname": "column_break_8",
    "fieldtype": "Column Break"
+  },
+  {
+   "fieldname": "disbursement_references_section",
+   "fieldtype": "Section Break",
+   "label": "Disbursement References"
+  },
+  {
+   "fieldname": "reference_date",
+   "fieldtype": "Date",
+   "label": "Reference Date"
+  },
+  {
+   "fieldname": "column_break_17",
+   "fieldtype": "Column Break"
+  },
+  {
+   "fieldname": "reference_number",
+   "fieldtype": "Data",
+   "label": "Reference Number"
   }
  ],
  "index_web_pages_for_search": 1,
  "is_submittable": 1,
  "links": [],
- "modified": "2020-11-06 10:04:30.882322",
+ "modified": "2021-04-10 10:03:41.502210",
  "modified_by": "Administrator",
  "module": "Loan Management",
  "name": "Loan Disbursement",
diff --git a/erpnext/loan_management/doctype/loan_repayment/loan_repayment.json b/erpnext/loan_management/doctype/loan_repayment/loan_repayment.json
index 86ea59d..8fbf233 100644
--- a/erpnext/loan_management/doctype/loan_repayment/loan_repayment.json
+++ b/erpnext/loan_management/doctype/loan_repayment/loan_repayment.json
@@ -239,14 +239,16 @@
   {
    "fieldname": "total_penalty_paid",
    "fieldtype": "Currency",
+   "hidden": 1,
    "label": "Total Penalty Paid",
-   "options": "Company:company:default_currency"
+   "options": "Company:company:default_currency",
+   "read_only": 1
   }
  ],
  "index_web_pages_for_search": 1,
  "is_submittable": 1,
  "links": [],
- "modified": "2021-04-05 13:45:19.137896",
+ "modified": "2021-04-10 10:00:31.859076",
  "modified_by": "Administrator",
  "module": "Loan Management",
  "name": "Loan Repayment",
diff --git a/erpnext/loan_management/doctype/loan_repayment/loan_repayment.py b/erpnext/loan_management/doctype/loan_repayment/loan_repayment.py
index baa45a4..728eadf 100644
--- a/erpnext/loan_management/doctype/loan_repayment/loan_repayment.py
+++ b/erpnext/loan_management/doctype/loan_repayment/loan_repayment.py
@@ -227,6 +227,14 @@
 		gle_map = []
 		loan_details = frappe.get_doc("Loan", self.against_loan)
 
+		if self.shortfall_amount and self.amount_paid > self.shortfall_amount:
+			remarks = _("Shortfall Repayment of {0}.\nRepayment against Loan: {1}").format(self.shortfall_amount,
+				self.against_loan)
+		elif self.shortfall_amount:
+			remarks = _("Shortfall Repayment of {0}").format(self.shortfall_amount)
+		else:
+			remarks = _("Repayment against Loan: ") + self.against_loan
+
 		if self.total_penalty_paid:
 			gle_map.append(
 				self.get_gl_dict({
@@ -267,7 +275,7 @@
 				"debit_in_account_currency": self.amount_paid,
 				"against_voucher_type": "Loan",
 				"against_voucher": self.against_loan,
-				"remarks": _("Repayment against Loan: ") + self.against_loan,
+				"remarks": remarks,
 				"cost_center": self.cost_center,
 				"posting_date": getdate(self.posting_date)
 			})
@@ -283,7 +291,7 @@
 				"credit_in_account_currency": self.amount_paid,
 				"against_voucher_type": "Loan",
 				"against_voucher": self.against_loan,
-				"remarks": _("Repayment against Loan: ") + self.against_loan,
+				"remarks": remarks,
 				"cost_center": self.cost_center,
 				"posting_date": getdate(self.posting_date)
 			})
diff --git a/erpnext/loan_management/doctype/loan_security_unpledge/loan_security_unpledge.py b/erpnext/loan_management/doctype/loan_security_unpledge/loan_security_unpledge.py
index c4c2d68..b24dc2f 100644
--- a/erpnext/loan_management/doctype/loan_security_unpledge/loan_security_unpledge.py
+++ b/erpnext/loan_management/doctype/loan_security_unpledge/loan_security_unpledge.py
@@ -6,7 +6,7 @@
 import frappe
 from frappe import _
 from frappe.model.document import Document
-from frappe.utils import get_datetime, flt
+from frappe.utils import get_datetime, flt, getdate
 import json
 from six import iteritems
 from erpnext.loan_management.doctype.loan_security_price.loan_security_price import get_loan_security_price
@@ -113,7 +113,11 @@
 				pledged_qty += qty
 
 			if not pledged_qty:
-				frappe.db.set_value('Loan', self.loan, 'status', 'Closed')
+				frappe.db.set_value('Loan', self.loan,
+					{
+						'status': 'Closed',
+						'closure_date': getdate()
+					})
 
 @frappe.whitelist()
 def get_pledged_security_qty(loan):