AVS verification returns 'Extra characters(s) found in attributes!'

There's a couple of issues. Your AVS and CVD elements should be part of the purchase and not in the cust_info. The expiry date format is YYMM. I also found that I needed to remove extra spaces from a few of the tags themselves, but this could have been due to copy pasting. Once that was done I was able to post the xml and receive a valid response.

<request>
<store_id>store3</store_id>
<api_token>yesguy</api_token>
<status_check>false</status_check>
<purchase>
<amount>10.10</amount>
<order_id>mon_test_01</order_id>
<cust_id>ll</cust_id>
<pan>4242424242424242</pan>
<expdate>2105</expdate>
<crypt_type>7</crypt_type>
<dynamic_descriptor></dynamic_descriptor>
<cust_info>
<billing>
<first_name>test</first_name>
<last_name>test</last_name>
<company_name>DE</company_name>
<address>123 street</address>
<city>Ottawa</city>
<province>ON</province>
<country>CA</country>
<postal_code>11111</postal_code>
<phone_number>1112223333</phone_number>
<fax></fax>
<tax1></tax1>
<tax2></tax2>
<tax3></tax3>
<shipping_cost></shipping_cost>
</billing>
<shipping>
<first_name>test</first_name>
<last_name>test</last_name>
<company_name>DE</company_name>
<address>123 street</address>
<city>Ottawa</city>
<province>ON</province>
<country>CA</country>
<postal_code>11111</postal_code>
<phone_number>1112223333</phone_number>
<fax></fax>
<tax1></tax1>
<tax2></tax2>
<tax3></tax3>
<shipping_cost></shipping_cost>
</shipping>
<item>
<name>PackagesSingleTicket</name>
<quantity>1</quantity>
<product_code>3318-3209</product_code>
<extended_amount>2.2600</extended_amount>
</item>
<email></email>
<instructions></instructions>
</cust_info>
<cvd_info>
<cvd_indicator>1</cvd_indicator>
<cvd_value>123</cvd_value>
</cvd_info>
<avs_info>
<avs_street_number>201</avs_street_number>
<avs_street_name>Michigan Ave</avs_street_name>
<avs_zipcode>M1M1M1</avs_zipcode>
</avs_info>
</purchase>
</request>