The New Mexico Affidavit of No Sales is a document used to indicate that no sales tax is applicable on a transaction between two parties. It is typically used when an individual or business is providing goods or services in New Mexico without collecting sales tax. The affidavit is also known as Form GRT-4, and must be completed and signed by both parties to the transaction. There are two types of New Mexico Affidavit of No Sales: one for purchases of goods and one for purchases of services. The purchaser must complete the relevant form, indicating the quantity and type of goods or services purchased, the purchase price, and the date of purchase. The seller must then sign the form to confirm that the transaction was exempt from sales tax. Both parties must keep a copy of the completed form for their records.