  In this note we prove a formula for the cancellation exponent $k_{v,n}$
between division polynomials $\psi_n$ and $\phi_n$ associated with a sequence
$\{nP\}_{n\in\mathbb{N}}$ of points on an elliptic curve $E$ defined over a
discrete valuation field $K$. The formula is identical with the result of
Yabuta-Voutier for the case of finite extension of $\mathbb{Q}_{p}$ and
generalizes to the case of non-standard Kodaira types for non-perfect residue
fields.
