diff --git a/src/services/spr.ts b/src/services/spr.ts
index 5a420a0..7668719 100644
--- a/src/services/spr.ts
+++ b/src/services/spr.ts
@@ -10,6 +10,7 @@ import { CECSlot } from '@/models/cec-slot';
 import { SendMode } from '@/types/common/spr-slot';
 import RequestException from '@/request-exception';
 import type { SPRSlot } from '@/types/common/spr-slot';
+import { LOG_WARN, LOG_INFO } from '@/logger';
 
 const spr = express.Router();
 
@@ -81,19 +82,21 @@ spr.post('/relay/0', multipartParser, async (request, response) => {
 	}
 
 	if (!request.pid || !request.nexAccount) {
-		response.sendStatus(400);
+		response.sendStatus(401);
 		return;
 	}
 
 	// * Check that the account is a 3DS and isn't banned
 	if (!request.nexAccount.friendCode || request.nexAccount.accessLevel < 0) {
-		response.sendStatus(400);
+		LOG_INFO(`{request.pid}: User is banned`);
+		response.sendStatus(403);
 		return;
 	}
 
 	const sprMetadataBuffer: Buffer | undefined = request.files['spr-meta'];
 
 	if (!sprMetadataBuffer) {
+		LOG_WARN(`{request.pid}: Missing spr-meta file`);
 		response.sendStatus(400);
 		return;
 	}
@@ -105,6 +108,7 @@ spr.post('/relay/0', multipartParser, async (request, response) => {
 	const metadataHeaders = sprMetadata.split('\r\n'); // * Split header lines
 
 	if (metadataHeaders.length < 1) {
+		LOG_WARN(`{request.pid}: spr-meta file is too short / empty`);
 		response.sendStatus(400);
 		return;
 	}
@@ -113,6 +117,7 @@ spr.post('/relay/0', multipartParser, async (request, response) => {
 		const metadataHeader = metadataHeaders[i];
 		const [header, value] = metadataHeader.split(': '); // * Split header and value
 		if (!header || !value) {
+			LOG_WARN(`{request.pid}: Bad spr-meta entry`);
 			response.sendStatus(400);
 			return;
 		}
@@ -121,6 +126,7 @@ spr.post('/relay/0', multipartParser, async (request, response) => {
 		// * we can guarantee that i must match with the slot we are looking at except for 0, which will be the slotsize
 		if (i === 0) {
 			if (header !== 'slotsize') {
+				LOG_WARN(`{request.pid}: spr-meta missing slotsize`);
 				response.sendStatus(400);
 				return;
 			}
@@ -130,12 +136,14 @@ spr.post('/relay/0', multipartParser, async (request, response) => {
 			try {
 				slotsize = parseInt(value);
 			} catch {
+				LOG_WARN(`{request.pid}: Invalid spr-meta slotsize`);
 				response.sendStatus(400);
 				return;
 			}
 
 			// * We don't count the slotsize header itself in the slot count
 			if (slotsize !== (metadataHeaders.length - 1)) {
+				LOG_WARN(`{request.pid}: Bad spr-meta slotsize`);
 				response.sendStatus(400);
 				return;
 			}
@@ -146,6 +154,7 @@ spr.post('/relay/0', multipartParser, async (request, response) => {
 		const metadata = value.split(','); // * Split the value to get the metadata
 
 		if (metadata.length !== 3) {
+			LOG_WARN(`{request.pid}: Bad spr-meta entry param count`);
 			response.sendStatus(400);
 			return;
 		}
@@ -158,6 +167,7 @@ spr.post('/relay/0', multipartParser, async (request, response) => {
 			gameID = parseInt(metadata[1], 16);
 			size = parseInt(metadata[2]);
 		} catch {
+			LOG_WARN(`{request.pid}: Invalid spr-meta entry params`);
 			response.sendStatus(400);
 			return;
 		}
@@ -168,11 +178,13 @@ spr.post('/relay/0', multipartParser, async (request, response) => {
 			const slotData: Buffer | undefined = request.files['spr-slot' + slot];
 
 			if (!slotData) {
+				LOG_WARN(`{request.pid}: Missing slot data file`);
 				response.sendStatus(400);
 				return;
 			}
 
 			if (slotData.length !== size) {
+				LOG_WARN(`{request.pid}: Invalid slot data size`);
 				response.sendStatus(400);
 				return;
 			}
@@ -187,21 +199,25 @@ spr.post('/relay/0', multipartParser, async (request, response) => {
 
 			// * Check that we at least have enough size for the StreetPass header
 			if (slotData.length < 0x12) {
+				LOG_WARN(`{request.pid}: Slot is too short`);
 				response.sendStatus(400);
 				return;
 			}
 
 			if (slotData.readUInt32LE() !== 0x6161) {
+				LOG_WARN(`{request.pid}: Slot header missmatch`);
 				response.sendStatus(400);
 				return;
 			}
 
 			if (slotData.readUInt32LE(4) !== size) {
+				LOG_WARN(`{request.pid}: Slot bad size`);
 				response.sendStatus(400);
 				return;
 			}
 
 			if (slotData.readUInt32LE(8) !== gameID) {
+				LOG_WARN(`{request.pid}: Slot bad gameID`);
 				response.sendStatus(400);
 				return;
 			}