diff --git a/bin/www.js b/bin/www.js
index 7a84e091..122901e6 100644
--- a/bin/www.js
+++ b/bin/www.js
@@ -25,7 +25,7 @@ function onError(error) {
 }
 function onListening(server) {
     const addr = server.address();
-    if (addr) {
+    if (addr !== null) {
         const bind = typeof addr === 'string' ? 'pipe ' + addr : 'port ' + addr.port.toString();
         debug('Listening on ' + bind);
     }
diff --git a/bin/www.ts b/bin/www.ts
index ddd72b5d..af6d0372 100644
--- a/bin/www.ts
+++ b/bin/www.ts
@@ -50,7 +50,7 @@ function onError(error: ServerError): void {
 function onListening(server: http.Server): void {
   const addr = server.address()
 
-  if (addr) {
+  if (addr !== null) {
     const bind =
       typeof addr === 'string' ? 'pipe ' + addr : 'port ' + addr.port.toString()
     debug('Listening on ' + bind)
diff --git a/handlers/admin-get/occupancyTypes.js b/handlers/admin-get/occupancyTypes.js
index 10a6d8a2..9ece2e01 100644
--- a/handlers/admin-get/occupancyTypes.js
+++ b/handlers/admin-get/occupancyTypes.js
@@ -8,7 +8,7 @@ export async function handler(_request, response) {
     const occupancyTypePrintTitles = {};
     for (const printEJS of occupancyTypePrints) {
         const printConfig = printFunctions.getPrintConfig(printEJS);
-        if (printConfig) {
+        if (printConfig !== undefined) {
             occupancyTypePrintTitles[printEJS] = printConfig.title;
         }
     }
diff --git a/handlers/admin-get/occupancyTypes.ts b/handlers/admin-get/occupancyTypes.ts
index 0362f351..27ad0c30 100644
--- a/handlers/admin-get/occupancyTypes.ts
+++ b/handlers/admin-get/occupancyTypes.ts
@@ -24,7 +24,7 @@ export async function handler(
   for (const printEJS of occupancyTypePrints) {
     const printConfig = printFunctions.getPrintConfig(printEJS)
 
-    if (printConfig) {
+    if (printConfig !== undefined) {
       occupancyTypePrintTitles[printEJS] = printConfig.title
     }
   }
diff --git a/handlers/lots-get/new.ts b/handlers/lots-get/new.ts
index 3b42063c..fdf11d49 100644
--- a/handlers/lots-get/new.ts
+++ b/handlers/lots-get/new.ts
@@ -5,7 +5,7 @@ import * as configFunctions from '../../helpers/functions.config.js'
 import { getMaps } from '../../helpers/lotOccupancyDB/getMaps.js'
 import * as cacheFunctions from '../../helpers/functions.cache.js'
 
-import * as recordTypes from '../../types/recordTypes'
+import type * as recordTypes from '../../types/recordTypes'
 
 export async function handler(
   request: Request,
diff --git a/handlers/lots-post/doSearchLots.d.ts b/handlers/lots-post/doSearchLots.d.ts
index 84998c62..7c872b55 100644
--- a/handlers/lots-post/doSearchLots.d.ts
+++ b/handlers/lots-post/doSearchLots.d.ts
@@ -1,3 +1,3 @@
-import { Request, Response } from 'express';
+import type { Request, Response } from 'express';
 export declare function handler(request: Request, response: Response): Promise<void>;
 export default handler;
diff --git a/handlers/lots-post/doSearchLots.ts b/handlers/lots-post/doSearchLots.ts
index 613b630e..0bd91afc 100644
--- a/handlers/lots-post/doSearchLots.ts
+++ b/handlers/lots-post/doSearchLots.ts
@@ -1,4 +1,5 @@
-import { Request, Response } from 'express'
+import type { Request, Response } from 'express'
+
 import { getLots } from '../../helpers/lotOccupancyDB/getLots.js'
 
 export async function handler(request: Request, response: Response): Promise<void> {
diff --git a/helpers/functions.print.js b/helpers/functions.print.js
index 08a9a801..80a74a6a 100644
--- a/helpers/functions.print.js
+++ b/helpers/functions.print.js
@@ -51,7 +51,7 @@ export async function getReportData(printConfig, requestQuery) {
     if (printConfig.params.includes('lotOccupancyId') &&
         typeof requestQuery.lotOccupancyId === 'string') {
         const lotOccupancy = await getLotOccupancy(requestQuery.lotOccupancyId);
-        if (lotOccupancy?.lotId) {
+        if ((lotOccupancy?.lotId ?? -1) !== -1) {
             reportData.lot = getLot(lotOccupancy.lotId);
         }
         reportData.lotOccupancy = lotOccupancy;
diff --git a/helpers/functions.print.ts b/helpers/functions.print.ts
index 2960ca90..9cf0b827 100644
--- a/helpers/functions.print.ts
+++ b/helpers/functions.print.ts
@@ -18,7 +18,9 @@ const screenPrintConfigs: Record<string, PrintConfig> = {
   }
 }
 
-export function getScreenPrintConfig(printName: string): PrintConfig | undefined {
+export function getScreenPrintConfig(
+  printName: string
+): PrintConfig | undefined {
   return screenPrintConfigs[printName]
 }
 
@@ -78,8 +80,8 @@ export async function getReportData(
   ) {
     const lotOccupancy = await getLotOccupancy(requestQuery.lotOccupancyId)
 
-    if (lotOccupancy?.lotId) {
-      reportData.lot = getLot(lotOccupancy.lotId)
+    if ((lotOccupancy?.lotId ?? -1) !== -1) {
+      reportData.lot = getLot(lotOccupancy!.lotId!)
     }
 
     reportData.lotOccupancy = lotOccupancy